AMPS / INT AMPS

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Voxativ


T-211 (Black Beauty) Integrated Amp – $19,900

The prettiest way to drive your high efficiency speakers.
12 watts of single ended 211 tube sound.

 

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Description

The Voxativ 211-based integrated amplifier is a 100 lbs. (45 kg) beauty. It is inbuilt in a one-piece housing that is milled out of a 150 lbs (63kg) aluminium block. The outside surface is anodized, not painted.

The internal circuit is a compete direct-through. Also used: Masaaki Oshima output transformers. Mr. Oshima defines his transformers as musical instruments and this is what you get.

Optional feature: Voxativ 211 tubes. These are especially made for us to get the highest resolution and best sound that is possible.
They are recognizable by their gold plated pins.

The Voxativ integrated amplifier: Excellent sound for Voxativ and all other high efficiency speakers.

On request this amplifier is equipped with a preamp-out stage to drive the Voxativ 9.87 speaker or woofer system.

Handmade by the team of Voxativ in Fulda/Germany.

 

Technical Data

Frequency Response 20 – 20.000 Hz
Signal to Noise Ratio 100 dB
Distortion 1 %
Tubes 2 x 211 – Voxativ Tubes with gold plated connectors
Input Sensitivity 520 mV
Input 3 x line
Output 8/16 Ohm and preamp-out
Power Handling 2 x 14 W
Power Consumption 200 W
Colour black
Dim W x H x D 43 x 25 x 47 cm
Weight 100 lbs (45 kg)

 

Voxativ M001 Mono Amplifier Pair – $17,800.00

Last Edition – THE LAST 10

This mono block amplifier is based on an 80’s Audiostar idea. A 300B tube drives an 845 output tube.
The 300B is responsible for excellent voice reproduction and the 845 brings up the needed power.

The price refers to a matched pair.

Voxativ Mono Amp 845

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Description

Voxativ loudspeakers do not need much amplifier power. 2 watts per channel are fine for a musical room volume. The 18 single-ended watts of our monobloc amplifiers can operate a concert hall. And this is how they sound: gigantic.

Just have in mind that Voxativ loudspeakers do have 100 dB efficiency in minimum. For this most amplifiers on the market are not made. Lots of them do hum or are noisy. The Voxativ 845 amp is absolutely quite and especially tuned for the needs of Voxativ widebanders.

This could be realized by a complete new circuit of Voxativ’s engineer Mr. Noll. He did equip these amps with great sounding output transformers by Masaaki Oshima. Chokes are especially constructed by Voxativ. Tube heating is DC. Furthermore all sound leading wires are silver. In and out bind posts are pure copper.

Optional feature: Voxativ 845 tubes. These are especially made for us to get the highest resolution and best sound that is possible.
They are recognizable by their gold plated pins.

Voices do come out crystal clear with this amp and classical music is as powerful as it has to be.

 

Technical Data

Frequency Response 20 – 20.000 Hz
Signal to Noise Ratio 95 dB
Distortion 1 %
Tubes 1 x 845, 1 x 300B, 1 x 6N7, 1x 6L7
Input Sensitivity 4 x 820 mV
Input 1 x line
Output 8, 16 Ohms
Power Handling 18 W
Power Consumption 160 W
Colour silver
Dim W x H x D 11,4 x 9 x 18,5 in (29 x 23 x 47 cm)
Weight 69 lbs (31.5 kg)

 



Audio Hungry

Qualiton A50i$7,500.

 

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QUALITON A50i

Class-A integrated vacuum tube amplifier with an output power of 2 x 50 W. The appliance can be connected to 4 Ω and 8 Ω nominal impedance speakers. The power outputs, based on output pentodes type KT 120, were tuned to the before-mentioned nominal loads through our in-house manufactured, precision winding output transformers. The bias control circuit plays an important role in the operation of the power output too. This curcuit monitors the quiescent current of the output tubes and adjusts it to a preset value. Thus, all four output tubes are in perfectly equal operation states.

Out of three asymmetric and one symmetric inputs, one can choose the desired one using the front panel volume control and input selector rotary switch. The symmetric input features a mini XLR connector. In this case too, the entire volume control and input selector unit is in full harmony with the shiny polished casing of the appliance, bringing together functionality and aesthetics perfectly.

The clearly arranged, minimalistic remote control was designed with this philosophy as well: the unique and aesthetical exterior design was always kept in mind and the usability was improved. Finally, a couple of words on the set of tubes we use: the audio signal arriving on the selected input of the appliance is received by vacuum tubes type Tungsram ECC83. The driving voltage as well as its matching are produced by E88CC/6922s. In power output, the before-mentioned output pentodes KT 120 are in action—strictly in Class-A.

Warranty: 2 years

Qualition A20i$4,999.

 

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QUALITON A20i

Stereo, Class-A integrated amplifier featuring push-pull circuitry. The rated power output of the appliance is 20 W at the most, each side. The outputs at the rear panel can be connected to 8 Ω nominal impedance speakers. The design of the output transformers of the power amp enable to connect the amp with 4 Ω nominal impedance speakers as well. This entails a slight deviation from the parameters indicated in the technical data sheet.

At the front panel, the volume control potentiometer and the input selector rotary switch are connected to the same shaft. Indicators informing about the actual state of the amp are located at the front panel too. It can be monitored whether the appliance is ready for operation (if so, the LED next to the volume control turns from red to white light). The user is also informed about the actual position of the input selector unit. The amp is made of solid, 1.5 mm thick, polished stainless steel sheet.

Warranty: 2 years

 

 

APX 200 -Stereo Amp$3,999.

 

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APX 200

As the successor of the former amp BEAG APX 100, we have created the vacuum tube stereo power amp Qualiton APX 200 which is able to operate low impedance speakers. As opposed to the previous model, in the case of the Qualiton APX 200 we did not insist on the monoblock design. Instead, we regarded it as more favourable if we used a more compact and economical stereo version compared to the previous design.

The power of the appliance was set as 2 x 100 W, consequently it is able to dynamically operate even more insensitive speakers. The frequency response of the power amp is fully linear in the audio-frequency range, at nominal, i.e. 100 W output power, measured with sinusoidal waveform. The low frequency breakpoint of the frequency response is 15 Hz, the upper cutoff frequency is 100 kHz (-3 dB points). In the entire audio-frequency range, the total harmonic distortion is less than 1% and the signal-to-noise ratio of the appliance is typically higher than 101 dB. While developing this product, the listed technical parameters were attained due to carefully designed circuit arrangements, a selected set of vacuum tubes and an accurately dimensioned and a manufactured output transformer.

The protection of the vacuum tube set is handled with special care. The lifespan of the tubes can be drastically reduced by uncontrolled transient surges of current at the moment of power-on. Similarly, suddenly switching high anode voltage on non-preheated vacuum tubes can have an adverse effect on the lifespan. In order to eliminate those effects, the appliance is equipped with a slow-start circuit and an anode voltage delay circuit.

Warranty: 2 years



PASS LABS


Xs Series

Class A

These are Pass Laboratories ultimate expression of Power Amplifiers the perfect blend of science and visceral emotion.

If there’s a more emotionally satisfying amplifier anywhere, we’re not aware of it.

The successor to our already lavishly praised and well regarded Supersymmetry patent. Every technical effort has been made to assure exceptional specifications, among these:

Separate chassis
for lower electromagnetic noise

Power supplies
with greatly enhanced storage capacitance

Banks of redundantly parallel high speed
and soft recovery rectifiers

Noise filters
with improved high frequency

Larger and quieter transformers

Improved passive decoupling

Lower power standby

Input impedances
of 200 k-ohm balanced with negligible capacitance

Xs Series 
Xs 300 300 watt mono & power supply– $85,000.00 pr

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The Xs series monoblock power amplifiers represent the reference-quality, state-of-art amplifiers from Pass Laboratories. Through years of “spare no effort” endeavor, they represent the true pinnacle of music reproduction. The Xs 300 delivers 300 watts, employs separate power supply and amplifier chassis’ for lower noise and utilizes higher-power constant-current source. Single-ended bias current not only lowers distortion, but facilitates better control of its harmonic structure, tweaked and optimized through endless listening tests for your musical pleasure.

Awards and Reviews  

Editor’s choice award 2017

The Absolute Sound

“Solid State Product of the Year”

-Tone Audio- USA  

“Best Performance of the Year 2014”

-Audio Art- Taiwan  

“Best Products of the year 2013 Award”

-hometheaterhifi.com- USA  

“Some might even proclaim them as the very best”

Positive Feedback  

“The end result is musically realistic and involving at every level.”

The Absolute Sound  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output/ch (8 ohm) 300
Distortion, (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 100
Power Consumption (Watts) 900
Temperature (deg C.) 53
Number of Chassis 2
Unit Dimension (W x D x H) (In.) 19 x 27.5 x 11 x 2
Unit Weight (LBS) 134 / 172

Xs 150 150 watt mono & power supply $65,000.00 pr

Like the Xs 300, this amplifier was developed through constant and thorough innovation. After years of SIT device experimentation, followed by deployment in Nelson’s First Watt designs, circuit modification captured the unique tube-like sonic footprint of SITs from much higher-output MOSFET devices used in the Xs series. The result is unparalleled, fatigue-free listening enjoyment.

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Awards and Reviews  

“Best Performance of the Year 2014”

-Audio Art- Taiwan

“Super Class A Presentation,Super Class A Price Tag!”

Everything Audio Network  

“Even straight from the box, they sounded very good”

Dagogo.com  

Circuitus Maximus Award 2017

Positive-Feedback  

Top o’ the line Brutus Awards 2017

Positive-Feedback  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output/ch (8 ohm) 150
Distortion, (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 100
Power Consumption (Watts) 700
Temperature (deg C.) 53
Number of Chassis 2
Unit Dimension (W x D x H) (In.) 19 x 21.5 x 11 x 2
Unit Weight (LBS) 102 / 132

“XA.8” Pure Class “A” High Current Series

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XA200.8 – 200 watt class A mono block – $42,000 pr

Are fabulous-sounding 400-watt-plus per channel class-A peaks attainable without loss of the musical detail or audible meltdown? Yes, through repeated listening tests and continual technical innovation that push performance standards, the XA200.8 achieves what most amplifiers can only dream about. Even for the most demanding, complex musical passages in larger rooms at high sound pressure levels, this model offers headroom to spare.

Awards and Reviews  

“Pass Labs XA200.8 Pure Class A”

Dagogo  

“Without hesitation, I could go the rest of my life and never feel the need to upgrade from the Pass XA200.8 amplifiers.

Tone Audio #84 / Greg Petan  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.00
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 200
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 6.3
Power Consumption (Watts) 760
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimension (W x D x H) (In.) 19 x 27.5 x 11
Unit Weight (LBS) 157

XA160.8 160 watt class A mono block – $27,300 pr

More of just about everything: 72 output power-MOSFETs, higher input impedance, higher capacity power supply and the ability to deliver over 320 watts per channel in class A with greater dampening. The 160.8’s deliver power and finesse in spades. Voices take on shape and depth, piano notes arrive with full acoustic integrity and the rest of the rhythm section is delivered with both powerful attack and holographic sustain. The effortless conveyance of musicality and realism must be heard to be believed.

Awards and Reviews  

“You must audition the XA160.8 I guarantee you will be highly impressed”

Tone Audio  

Editors’ Choice Award 2017

The Absolute Sound

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.79
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 160
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 4.8
Power Consumption (Watts) 580
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.5 x 11
Unit Weight (LBS) 123

XA100.8 100 watt class A mono block – $20,300 pr

The middle sibling of the XA.8 series, the XA100.8’s realize a muscular yet highly refined sonic profile. Like all Pass Laboratory’s power amplifiers, they features both single-ended and balanced inputs, Furutech five-way binding posts and a convenient ground terminal for safe subwoofer connection. Improved constant-current sourcing, precise voltage references and current-feedback all represent new benchmarks in state-of-art amplifier design. The result is a larger, more realistic soundstage, sharper transient response and the prized ability to reach concert-hall dynamics and realism without strain.

Awards and Reviews  

“They’re so versatile and rewarding that it would be hard to praise them enough.”

Part Time Audiophile  

“It would be tragic if you pulled the trigger on another brand/model and then happened to hear what this magnificent beast can do”

Canada Hifi  

“Ignite the imagination and accelerate your heart rate to thousands audiophiles worldwide”

Sound Rebels  

Parttime audiophile Editors Choice

Parttime Audiophile  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.41
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 100
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.5
Power Consumption (Watts) 420
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 9
Unit Weight (LBS) 99

XA60.8 60 watt class A mono block – $13,500 pr

Offering all the sonic benefits of the .8 amplifier line, a pair of XA60.8’s also grace the listener with mono-block performance: dedicated power supplies for each channel, dedicated circuitry for each channel and dedicated chassis’ for each channel offer a cleaner, better defined image and soundstage. Beautiful to the ears and eyes, this model achieves levels of focus and intimacy normally associated with the finest tube amplifiers. The XA60.8’s do all of this while providing greater control and power.

Awards and Reviews  

“Rock-solid dependability, never needing repair”

Home Theater Review  

“There are speakers that need more power and the XA60.8 is the choice”

Dagogo  

“So then, you might ask, what is the Pass Labs “family” sound? Different people hear things differently, but for me, it goes something like this: it’s somewhat warm, well-balanced top to bottom, dimensional, and forgiving, all while demonstrating prodigious bass.” John Richardson

parttimeaudiophile.com  

“The improvements rendered by the Pass Labs XA60.8s weren’t only in the soundstage; the sound was now, when called for, sweeter, warmer, more delicate—as, for example, with the voices and tenor sax on Getz/Gilberto, an oh, so familiar recording I explored with new interest with the XA60.8s in the system.” Jim Austin

Stereophile  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.10
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 60
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.3
Power Consumption (Watts) 400
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

XA30.8 30 watt per channel stereo- $6,800

An exceptional stereo power amplifier on many levels — high-biased MOSFETs providing higher-power class A operation, direct-coupled front-end circuitry for exceptionally high stability and larger, more robust heats sinks similar to those of the larger .8 amplifiers. The list goes on, but listening may tell you the XA30.8 represents a value high-point — quite possibly your particular optimal balance between performance and cost.

Awards and Reviews  

HomeTheaterReview – Best of 2016 Award

HomeTheaterReview

“For me, listening to the XA30.8 is not unlike the first time I heard a really great stereo system; it is different, alive, and fantastic”

Positive Feedback  

Writers’ Choice Award, 2015

Positive Feedback

“This would be my first exposure to the grown-up stuff of Pass Labs”

6moons  

“The Pass Labs XA30.8 excelled at musical flow”

Dagogo  

“A pure conduit for music you ask? It truly is, and you must go and listen”

Enjoy The Music  

“It has everything you could ever want”

Home Theater HiFi  

Another stunning review of the XA30.8, available in Tone Audio #78 page 182

Tone Audio

“You can sit for hours enjoying the tube-like, highly detailed musical nature of the XA30.8 with virtually no listening fatigue”

Home Theater Review  

Technical specifications  

Class A
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 0.77
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 30
Distortion (1 KHz, full power) 1%
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.3
Power Consumption (Watts) 400
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

“X.8” High Voltage Series Amplifiers 

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X600.8 600 watt mono block – $27,300 / pr

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The X600.8 monoblock amplifiers deliver 600 watts into 8 ohms. Even more impressive they effortlessly drive the most demanding loudspeakers to musical nirvana, be the performance full scale orchestra, high-decibel rock band or string quartet. Exhaustive listening tests, not myopic focus on specifications have informed the development of this and the rest of the Pass Labs product offering, and you can hear it.

Awards and Reviews  

“Solid build quality”

hometheaterhifi.com  

Technical specifications  

Class AB
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 3.46
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 600
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 4.6
Power Consumption (Watts) 550
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimension (W x D x H) (In.) 19 x 21.5 x 11
Unit Weight (LBS) 123

X260.8 260 watt mono block – $13,500 / pr

The X260.8 is a refined musical instrument delivering 260 watts into 8 ohms, and combines power and finesse with all the benefits of mono-block performance. Its measured performance – distortion, bandwidth, noise, and resolution is beyond reproach. Like all of the class A/B .8’s, this amplifier has some class A bias, rewarding its listeners with a whole new zenith of sound quality.

Technical specifications  

Class AB
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.2
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 260
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.1
Power Consumption (Watts) 375
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

X350.8 350 watt per channel stereo – $14,200

At 350 watts per channel class A/B, the X350.8 is the largest and most powerful stereo power amplifier of Pass Labs line-up. Because we care more about how holistic design affects the musical experience and relatively less about how parts affect specifications, you can expect superb and accurate representation of the recording performance and venue, as well as the distinctive layering of instruments captured faithfully.

Awards and Reviews  

“This is a high-powered, audiophile amp that delivers the desired sound”

Everything Audio  

“A superb example of the Pass Labs commitment to trickle down product development”

Positive Feedback  

Positive Feedback Writers Choice Award

Positive Feedback  

Technical specifications  

Class AB
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.65
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 350
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 4.6
Power Consumption (Watts) 550
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.5 x 11
Unit Weight (LBS) 127

X250.8 250 watt per channel stereo – $10,000

This stereo class A/B model represents a step up in power and performance from the X150.8 and, like all of our products, has been painstakingly designed, tweaked, redesigned and fine-tuned to deliver maximum musical enjoyment. This hard work and creativity results in a greater “look-back” at the original musical performance, conveying additional insight to the artist’s creative intent. Isn’t that what it’s all about?

Awards and Reviews  

“Best of 2015 Awards”

-Home Theater Review- USA  

“This generation of Nelson Pass designs is the best that Nelson and his team have created so far.”

Home Theather Review  

“It has been my pleasure to experience the X250.8 as it was another great performer!”

Enjoy The Music  

“It’s probably the best sounding power amp I’ve had the pleasure of using in my system up to this time.”

Paul  

“With the X250.8 there’s detail, but there’s also texture.”

Part-Time Audiophile  

“An amplifier that viscerally connects you to the heart and soul of the musician(s) you are listening to”

Connoisseur Corner  

“Build quality is top shelf and the design has just enough subtle “audio jewelry” to delight the audiophile crowd”

Connoisseur Corner  

Technical specifications  

Class AB
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.24
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 250
Distortion, (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.4
Power Consumption (Watts) 450
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 9
Unit Weight (LBS) 100

X150.8 150 watt per channel stereo – $6,750

As the entry-level class A/B stereo power .8 amplifier, the X150.8 features many of the same technical and sonic attributes of its larger brethren. It features 150 watts per channel, 100K ohm input impedance and operates “higher” into Class A than its predecessors. But knowing the ear is not a microphone and the brain is not a tape recorder, we’ve designed this model to bridge the gap between measured performance and outstanding subjective musical experience. Simply put, the X150.8 will compel you to listen to your entire music collection again and again.

Technical specifications  

Class AB
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.73
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 150
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 2.9
Power Consumption (Watts) 375
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

XA Series

Class A

Entering their 22nd year of production, the X and XA power amplifiers have remained at the cutting edge of audio through continuous innovation and refinement. At Pass we build amplifiers with excessive output stages, huge heat sinks and massive power supplies. We use the highest quality components in simple linear topologies, assembled and tested with great care in Auburn, California. They measure well and sound great. They are heavy, reliable and expensive.

Awards and Reviews  

“As I listened to album after album, I could hear the textures, colors, tones, and harmonics of music in a way that was very moving. The system’s timbre realism with individual instruments and voices was as satisfying with the XA25 as it had been with any amp. All of this added up to enable my system to play music with a wonderful lifelike flow.” Jack Roberts

http://theaudiobeatnik.com  

Technical specifications  

Gain 20 dB gain
Output Power 25 Watts rms @ 8 ohms 50 Watts rms @ 4 ohms
Distortion 0.1% @ 25 Watts, 8 ohms, 1 KHz
Class A envelope 50 Watt peak for 2, 4 or 8 ohm load
Bandwidth DC to -2 dB @ 100 KHz
Noise Less than 50 uV output, unweighted 20 to 20 KHz
Damping Factor 500
Slew rate 100 V/uS
Input Impedance 47 Kohm
Peak Current 10 Amp output (200 Watt peak into 2 ohms)
Protection Shutdown at 10 amps output
Idle Power draw 2.0 Amps @ 120 VAC (240 Watts)

Integrated Amplifiers 

Audiophiles, serious Audiophiles, have not considered an integrated amplifer as worthy product for 30+ years. Pass Labs has changed this paradigm, forever!

Operational points
optimized for higher wattage requirements

Greater versatility

Stable
into any concievable load

Spectacular with difficult speaker loads

INT-250 250 watt Integrated – $12,000

Like the INT-60, the INT-250 utilizes the synergies developed in the .8 series power amplifiers. Unlike the INT-60, however, it brings 250 watts per channel of listening pleasure. With higher power MOSFETs and more of them, the INT-250 drives large, demanding and relatively inefficient loudspeakers at higher volumes without batting an eyelash, singing beautifully. Just incredible music from one component.

Awards and Reviews  

Editors Choice Award – 2017

The Absolute Sound

Best Performance of the year – 2017

Audio Art – Taiwan

Integrated Amplifier of the Year – 2016

The Absolute Sound

“The INT-250 also throws its prodigious weight around in the most unexpected and tender ways.”

The Absolute Sound  

Brutus Award

Postive Feedback

Technical specifications  

Class AB
Type Stereo
Gain (dB) 30/36
Volume control (1dB steps) 63 dB
Remote Yes
Inputs 4
Outputs 2
Frequency Response -6 dB @ 80 KHz
Power Output /ch (8 ohm) 250
Distortion, (1 KHz, full power) 1%
Input Impedance (Kohms) ea Leg 45
Damping Factor 150
Output Noise (uV) <250
Input CMRR (dB) -60
DC Offset (V) 0.05
Leaves Class A pk 15
Power Consumption (Watts) 450
Dimensions (W x H x D) 19 x 21.25 x 9.1
Weight (LBS) 105

INT-60 60 watt Integrated – $9,000

INT-60_on_desk

This integrated amplifier sets a new benchmark in significantly narrowing any perceived performance gap between separate components and integrated amplifiers. Advanced technologies and real-world testing combine to create the INT-60 which presents 60 glorious watts per channel into 8 ohms, and doesn’t leave class A until 30 watts thanks to its high-bias operation. This larger class A operating envelope brings lower distortion and greater loudspeaker control, delivering higher quality musical fidelity for your enjoyment.

Awards and Reviews  

So what does the INT-60 sound like? I’m sure this is too simplistic, but it sounds like music.

Positive-Feedback  

“Distilling it all down, it’s an amplifier that makes me happy because it gets me more involved and closer to the musical experience.”

Part-Time Audiophile  

“The INT-60’s dominant trait was to suck me in and glue me to my seat as it continued to reproduce music with so much low-key flavor, natural color, and more-ishness that I could never play just one record and go to bed early. ”

Stereophile  

“Writers’ Choice Award 2015”

Positive Feedback  

“I strongly recommend that you check out this remarkable audio achievement.”

Positive Feedback  

“Technical progress and music fun”

Music Emotion  

Constitutes the heart of the integrated amplifier

Report magazine  

Writers’ Choice Award, 2015

Positive Feedback  

“if you want to hear beautiful music produced by an integrated amplifier that is built to last a life time and is one handsome-looking beast without constantly messing with your system, the Pass Labs INT-60 integrated amplifier is for you.”

HomeTheaterReview.com  

“The INT-60, indeed, is one of the best sounding integrated preamp/amplifiers I have ever reviewed. It is tough to better the INT-60 with separates in this price range. Even if you spend a bit more, you probably will not top it. Incredible detail, width and depth in the expansive stereo image, plus quick bass response.” John Gatski

Everything Audio Network  

Everything Audio Network – Stellar Sound Award

  

Writers Choice Awards 2017

Positive-Feedback  

Technical specifications  

Class AB
Type Stereo
Gain (dB) 29/35
Volume control (1dB steps) 63 dB
Remote Yes
Inputs 4
Outputs 2
Frequency Response -6 dB @ 80 KHz
Power Output/ch (8 ohm) 60
Distortion (1 KHz, full power) 1%
Input Impedance (Kohms) ea Leg 45
Damping Factor 150
Output Noise (uV) <250
Power Consumption (Watts) 375
Temperature (deg C.) 53
Dimensions (W x H x D) 19 x 21.2 x 7.6
Weight (LBS) 93

INT-30A 30 watt Integrated – $7,500

 

Headphone Amp

HPA-1 SE Headphone Amplifier – $3,500

 

Class A

Announcing the new Headphone Amp from Pass Labs!

Like the XP preamplifiers, the HPA-1 is the result of great attention to detail.

Starting at the power cord, the AC line is first filtered for high frequency noise and then isolated by a special toroidal transformer shielded by mu-metal for lower magnetic noise and shielded for electrostatic noise by a separate Faraday shield, grounded to analog ground. This is followed by fast/soft recovery rectifiers, generous CRC passive filtering and sophisticated discreet DC regulators and then more passive RC filters.

Works with headphones
with impedances of 15 ohms to 600 ohms

Low feedback wide bandwidth discreet design.

Class A
direct coupled Mosfet output stage

Custom low noise Torodial power transformer
with a Farady shield

Discreet regulated power supply for audio circuits.

The HPA-1 headphone amplifier was designed ground-up to become what we believe is one of the very best sounding headphone amplifiers available today. With low feedback, wide bandwidth and a direct coupled MOSFET output stage, this musical instrument drives even the most difficult headphone loads with ease, power and grace. The HPA-1 also functions as a line-level preamplifier that sonically rivals much higher-priced competition. The measured performance is superb and the sound even better.

Awards and Reviews  

“To put it bluntly, Pass Labs HPA-1 is an exceptional, very addictive headamp/preamp combo every aficionado should at least audition once an opportunity strikes.”

HiFi Knights  

” If I did not know that the HPA-1 was transistor-based, I would’ve been fooled: the HPA-1 had the natural warmth and slight fullness that mimic tubes.” ” In my view, headphone listening is about intimacy, and the HPA-1 is nearly perfect in this regard.”

HometheaterReview.com  

“As far as headphones go, the HPA-1 is a brilliant amp which deserves every bit of praise I’ve thus far heaped on it.”

Part-Time Audiophile  

Headphone Amplifier of the Year – 2016

The Absolute Sound

Best Headphone Amplifier – Best of Awards – 2016

HomeTheaterHiFi

“One Of The Best HPAs In The Audiophile World!”

Everything Audio Network  

“The HPA-1 had an effortless quality that made recorded music sound more like the real thing.”

CNET  

“Pass Labs, one of the most prestigious names in audio, has launched a terrific headphone amplifier”

Home Theater HiFi  

“in bass clarity and authority and in midrange transparency, the Pass Labs HPA-1 is without peer”

Stereophile  

“The Pass HPA-1 is on the top tier of the world’s finest headphone amplifiers”

Tone Audio  

“This thing sounds so damn good twenty minutes out of the box”

Tone Audio  

“An amplifier that drives headphones to exceptional performance”

alpha-audio.nl  

“The best I’ve heard from a headphone amp anywhere near the HPA-1’s price.”

Enjoy The Music  

“the Pass Labs HPA-1 is a bona fide muscle amp in the guise of an equal-opportunity preamp with headfi function.”

6Moons  

“Dynamics and authority are two of the best qualities in all listening sessions with the HPA-1, regardless of the headphone. With a great current delivery it also drives any planarmagnetic headphone, with an absolute control.”

www.oldnewsound.es  

Technical specifications  

Gain (dB) 8 dB
Power Consumption (W) 23
Output Power into 20 ohms 3500 mW
Output Power into 300 ohms 200 mW
Frequency Response 10hz -100k -1 dB
THD + Noise < 0.005 at 1V out
Input Impedance 50K Ohm
Output Impedance < 2 ohms

SIT-1 Power Amplifier 

– pure class “A” single end 10 watts – $10,000 / pr

The SIT-1 is the first of a new generation of power amplifiers using Static Induction Transistors (SIT) in single-stage, single-ended Class A circuits delivering superlative sound without feedback or degeneration. This is made possible by the unique characteristic of First Watt’s custom SIT devices, which combines a square-law input character with a low impedance output to form the only solid state gain device which behaves like a Triode tube.

This character has long been sought as a potential replacement for tubes, but the realized devices have several advantages. The Pass SIT device has higher gain and lower distortion and also conveniently operates at the voltages and currents required by loudspeakers. This means that an output transformer, with all its bandwidth and distortion limitations is eliminated.

The owner’s manual can be downloaded in pdf format here: SIT-1 Owner’s Manual

You can read more about SITs here: SIT Introduction

The SIT-1 has only one active device in the circuit. All the other components are passive, as illustrated in the following diagram:

In this circuit, the signal is presented at the Gate of the SIT and appears at the output with a voltage gain of about 18 dB. The input impedance is about 47000 ohms, and the output impedance is about 4 ohms, or a current gain of about 10,000 to 1.

There are other amplifiers which operate without negative feedback loops for the purpose of improving performance, but it is a poorly understood fact that the bulk of them use degeneration on the gain devices to improve the performance, which is widely regarded as just another form of feedback.

The SIT-1 uses neither loop negative feedback nor degeneration. As a result, the sound of the amplifier entirely reflects the character and chosen operating point of this single device. It is no exaggeration to say that the amplifier speaks with a single voice. Nevertheless the measured performance is quite good compared to the single-ended tube circuits (SETs) operated with multiple stages and feedback:

The distortion is second harmonic in character, and this is constant across the audio band. The frequency response is flat from 1.5 Hz to 200 Khz. The amplifier operates at 200 watts, and is designed to operate with loads from 4 ohms to 16 ohms.

Because the unique character of the SIT device is a function of the voltage/current values (“load-line”) it experiences with a load, the SIT-1 amplifier has been equipped with an adjustment to help optimize the performance with different loudspeakers. A knob on the front panel is used to tweak the operating point of the gain device as indicated by a meter display. It is this feature which further distinguishes the monoblock SIT-1 from the stereo SIT-2, as it allows the last bit of performance refinement.

It’s interesting to try to describe the effect of this amplifier on the performance of high sensitivity loudspeakers. The sound is fast but very smooth, with a very organic, musical character. The spatial presentation is very three dimensional, with exceptional localization. You will find it easy to “drill down” so as to focus on individual instruments in an ensemble. Also, the amplifier appears to have more power than it’s rating suggests, as the overdriven characteristic is very soft.

A typical critical comment:

The amp sounds “big”. There is a large, open sound stage that fills the room, that is the first thing that you notice when the amp is plugged in. The effect is a little intoxicating. …the SIT seems to bring a lot more control & detail to the speaker. The tube sweetness is present, yet the presentation is very clean. This is like a very nice low distortion SET. The SIT presents details, but with proper dynamic contrast. Details do not poke you in the eye, they just naturally unfold as part of the music.

You can also read some commentary describing the prototype SIT-2 in 6moons.

 

SIT-2 Stereo Amp – pure class “A” single end 10 watts – $5,000

 

SIT-2 Power Amplifier

The SIT-2 is the first of a new generation of power amplifiers using Static Induction Transistors (SIT) in single-stage, single-ended Class A circuits delivering superlative sound without feedback or degeneration. This is made possible by the unique characteristic of First Watt’s custom SIT devices, which combines a square-law input character with a low impedance output to form the only solid state gain device which behaves like a Triode tube.

This character has long been sought as a potential replacement for tubes, but the realized devices have several advantages. The Pass SIT device has higher gain and lower distortion and also conveniently operates at the voltages and currents required by loudspeakers. This means that an output transformer, with all its bandwidth and distortion limitations is eliminated.

You can download the owner’s manual here: SIT-2 Owner’s Manual

You can read more about SITs here: SIT Introduction

The gain of the SIT-2 is the result of the single gain device in the circuit, the Pass SIT transistor. The other semiconductors form a nearly constant current source, as illustrated in the following diagram:

In this circuit, the signal is presented at the Gate of the SIT and appears at the output with a voltage gain of about 18 dB. The input impedance is about 47000 ohms, and the output impedance is about 4 ohms, or a current gain of about 10,000 to 1.

There are other amplifiers which operate without negative feedback loops for the purpose of improving performance, but it is a poorly understood fact that the bulk of them use degeneration on the gain devices to improve the performance, which is widely regarded as just another form of feedback.

The SIT-2 uses neither loop negative feedback nor degeneration. As a result, the sound of the amplifier entirely reflects the character and chosen operating point of this single device. It is no exaggeration to say that the amplifier speaks with a single voice. Nevertheless the measured performance is quite good compared to the single-ended tube circuits (SETs) operated with multiple stages and feedback:

The distortion is second harmonic in character, and this is constant across the audio band. The frequency response is flat from 1.5 Hz to 200 Khz. The amplifier operates at 200 watts, and is designed to operate with loads from 4 ohms to 16 ohms. The character of the SIT device is a function of the voltage/current values (“load-line”) it experiences with a load and the SIT-2 amplifier has been adjusted for most optimal sound in the region around 8 ohms.

It’s interesting to try to describe the effect of this amplifier on the performance of high sensitivity loudspeakers. The sound is fast but very smooth, with a very organic, musical character. The spatial presentation is very three dimensional, with exceptional localization. You will find it easy to “drill down” so as to focus on individual instruments in an ensemble. Also, the amplifier appears to have more power than it’s rating suggests, as the overdriven characteristic is very soft.

A typical critical comment on the sound:

The amp sounds “big”. There is a large, open sound stage that fills the room, that is the first thing that you notice when the amp is plugged in. The effect is a little intoxicating. …the SIT seems to bring a lot more control & detail to the speaker. The tube sweetness is present, yet the presentation is very clean. This is like a very nice low distortion SET. The SIT presents details, but with proper dynamic contrast. Details do not poke you in the eye, they just naturally unfold as part of the music.

You can also read some commentary describing the prototype SIT-2 in 6moons.

Regular production starts in December 2011 and is expected to be delivered in late January 2012.

The owner’s manual will be posted on-line as soon as it is completed.

J2  Stereo Amp – pure class “A” single end 25 watts Jfet- $4,000

First Watt J2

J2 Power Amplifier

The J2 is a stereo power amplifier rated at 25 watts per channel. It has a two-stage circuit that operates in pure single-ended Class A mode, with signal JFET devices forming the input stage and power JFET devices for the output stage.

JFET transistors have long been recognized as having the highest audio quality of any transistor; the input devices of the J2 are known through the industry as the standard for low noise and linearity, and are found on the inputs of the finest phono stages, line level preamplifiers, and power amplifiers.

But for over 30 years robust power JFETs have not been widely available since the short-lived efforts of Sony and Yamaha. In the last few months, advances in Silicon Carbide (SiC) technology have resulted in new power JFET transistors with high voltage, current, and power capabilities – as high as 1200 volts, 30 amps, and 273 watts.

Created by SemiSouth Corporation of Mississippi, these robust new JFETs are designed for very fast high power switching in solar power and electric car applications. However, they also have a very low distortion characteristic that makes them superb for use in linear amplifiers. In apples-to-apples comparisons with comparable MOSFET type power transistors, they can achieve 10 to 20 dB improvements in distortion performance.

For over 10 years First Watt has been pushing the design envelope with simple high performance Class A amplifier circuits, and when a better transistor like this comes along, it can mean getting the same distortion performance with a lot less feedback, or lower distortion with the same amount of feedback. The J2 does amplifier does both,and that helps make it a better sounding amplifier than the best of its predecessors.

F7  Stereo Amp – pure class “A” push pull 20 watts – $3,000

 

F7 Power Amplifier

The F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET

topology with fewer parts than any First Watt amplifier to date and incorporating

a very interesting balance of very low negative voltage feedback and a little bit of

positive current feedback to give an astonishing measure of control over reactive

loudspeaker loads.

The F7 is now in production.

The owner’s manual can be downloaded here: F7 Owner’s Manual

Here is a link to the first of many reviews: F7 at 6moons

Availability is March 2016 at a list price of $3000.

F6 Stereo Amp – pure class “A” push pull 25 watts – $3,000

F6 Power Amplifier

The F6 is a very interesting amplifier, first designed in 2012 and presented in October at the Burning Amp Festival in San Francisco. The transcript of my presentation there is available on the First Watt website under articles –

F6 Talk at Burning Amp Festival 2012

and contains numerous comments and details about the original design, some of which are repeated here.

The amplifier was not initially slated for commercial production, and I continued to refine the design over the course of the next year and a half, working with different parts and adjustment values until both I and my listeners were satisfied that I had gotten the most out of this topology.

You can read the owner’s manual here: F6 Owner’s Manual

I think you will find that both pieces contain some interesting observations about sound and design.

The F6 will become available this month (June 2014) and has a list price of $3500.



PS Audio


 

BHK 250$7,499.00

 

BHK 300 (pr) –  $14,999.00

Bascom H. King’s magnum opus featuring a vacuum tube input with a powerful MOSFET output capable of either 250/500 wpc in the Stereo 250, or 300/600 watts in the Mono 300. Differentially balanced from input to output. Running everything in parallel, the mono offers double the current for tough loads and a more lifelike sound. Available in silver or black.

Steller S300 Amplifier$1,500

psaudiostack

Steller M700 Amplifier$3,000

Sprout – $499.00
An amp for the modern home. 50W per channel amplifier, passive EQ moving magnet phono preamp, low output impedance headphone amp. 192kHz/24 bit asynchronous DAC. Bluetooth, USB, coax, analog inputs accepted. True analog stepped volume knob.

 



Arcam

FMJ Power Amplifiers

P49 –  $5,000.00

reference 2 channel power amplifier

  • ‣  special order, allow 3-4 weeks
  • ‣  class-G amplification w/ pure class-A to 50WPC
  • ‣  acoustically damped chassis
  • ‣  fully balanced
  • ‣  200WPC@8ohm,400WPC@4ohm
  • ‣  bridged: 1100 WPC @ 4 ohm
  • ‣  stable to 2 ohms (stable to 3 ohms bridged)
  • ‣  singled ended RCA and balanced XLR inputs
  • ‣  weight: 39.6 lb. (18 Kg.), 43.3 lb. (19.7 Kg.) packed
  • ‣  dimensions (including feet and speaker outputs):  17.05” (433mm) W x 16.73” (425mm) D x 6.73” (171mm) H

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P349  $5,750.00

reference 3 channel power amplifier

  • ‣  special order, allow 3-4 weeks
  • ‣  identical specs to P49
  • ‣  180 WPC @ 8 ohm, all channels driven
  • ‣  weight: 39.6 lb. (18 Kg.),43.3 lb. (19.7 Kg.) packed
  • ‣  dimensions (including feet and speaker outputs):

17.05” (433mm) W x 16.73” (425mm) D x 6.73” (171mm) H

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P429 $2,500.00

4 channel class-G power amplifier

  • ‣  all channels driven, 4Ω/8Ω, 20Hz–20kHz 125W/90W
  • ‣  One channel driven, 4Ω / 8Ω, 1kHz 180W/110W
  • ‣  BR (bridged) mode
  • ‣  Two channels driven, 8Ω, 20Hz–20kHz 270W
  • ‣  One channel driven, 8Ω, 1kHz 320W
  • ‣  weight: 20.2 lb. (9.2 Kg.), 23.5 lb. (10.7 Kg.) packed
  • ‣  dimensions (including feet and speaker outputs):

17” (433mm) W x 10.8” (275mm) D x 3.4” (85mm) H

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FMJ Integrated Amplifiers

A49 $5,750.00

Arcam’s highest performing integrated amp ever Class G amplification with 50W of class A operation toroidal transformer
acoustically dampened chassis

dual mono volume control
fully balanced input-to-output
paralleled transistor output stages
6 line level RCA inputs
1 balanced XLR input
selectable unity gain (theater bypass)
on-board phono input configurable for line or MM RCA and balanced XLR pre-outputs
RCA record output
headphone output 200WPC@8ohm,400WPC@4ohms
2 ohm stable
on-board 6V PSU for rSeries products
multi-function remote control
weight: 43.3 lb. (19.7 Kg.), 47.1 lb. (21.4 Kg.) packed dimensions (including feet and speaker outputs): 17.05” (433mm) W x 16.73” (425mm) D x
6.73” (171mm) H

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A39 $2,700.00

compact high performance integrated amplifier Class G amplification with 20W of class A operation toroidal transformer
acoustically dampened chassis

paralleled transistor output stages
6 line level single-ended RCA inputs
on-board phono input configurable for line or MM single ended RCA preout & record output 120WPC@8ohm,240WPC@4ohms
on-board 6V PSU for rSeries products multi-function remote control
weight: 25.3 lb. (11.5 Kg.), 29 lb. (13.2 Kg.) packed dimensions (including feet and speaker outputs): 17.05” (433mm) W x 16.73” (425mm) D x
3.94” (100mm) H

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A29 $1,600.00

compact mid-level integrated amplifier class G amplifier
toroidal transformer
acoustically dampened chassis

6 line level single-ended RCA inputs
on-board phono input configurable for line or MM single ended RCA preout & record output 80WPC@8ohm,140WPC@4ohms
on-board 6V PSU for rSeries products multi-function remote control
weight: 20.2 lb. (9.2 Kg.), 23.5 lb. (10.7 Kg.) packed dimensions (including feet and speaker outputs): 17” (433mm) W x 10.8” (275mm) D x 3.4” (85mm) H

Solo Series Components, Speakers & Subs

Solo Movie $3,000.00

‣ compact 5.1 receiver with BluRay disc player ‣ class G amplification
‣ Apt-X Bluetooth w/ Bluecore technology
‣ WiFi wireless internet

‣ UPnP/DLNA/Internet Radio capability for streaming audio and video from network devices (NAS)

‣ 4 HDMI inputs, 1 HDMI output
‣ 1 coax digital, 1 TOSLINK optical input
‣ 1 line level RCA input, 1 3.5mm input
‣ FM tuner onboard
‣ subwoofer output
‣ 60 WPC @ 8 ohm, all channels
‣ 75 WPC @ 4 ohms. all channels
‣ multi-function remote control
‣ automation via IP, RS232, IR & 12V trigger
‣ weight: 20.2 lb. (9.2 Kg.), 23.5 lb. (10.7 Kg.) packed ‣ dimensions (including feet and speaker outputs):

16.5” (420mm) W x 16” (400mm) D x 3.4” (85mm) H ‣ graphite finish

 

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Wyred4Sound


Mono-Block Amplifiers

SX-1000R$1,799 ea

mAMP$999 ea

Stereo Amplifiers

ST-500 mkII$1,499 

ST-1000 mkII$1,999

Multi-Channel Amplifier

MC7150 (150w X7) $1,599

Integrated Amplifiers

STI-500 v2 $2,499

STI-1000 v2$2,999

mINT$1,499

CONTACT

Mike Phalan | Audio Expert 

gestalthifi@gmail.com      

18599 HWY 84/285, 87532

(808) 640-8947

Xs Series

Class A

These are Pass Laboratories ultimate expression of Power Amplifiers the perfect blend of science and visceral emotion.

If there’s a more emotionally satisfying amplifier anywhere, we’re not aware of it.

The successor to our already lavishly praised and well regarded Supersymmetry patent. Every technical effort has been made to assure exceptional specifications, among these:

Separate chassis
for lower electromagnetic noise

Power supplies
with greatly enhanced storage capacitance

Banks of redundantly parallel high speed
and soft recovery rectifiers

Noise filters
with improved high frequency

Larger and quieter transformers

Improved passive decoupling

Lower power standby

Input impedances
of 200 k-ohm balanced with negligible capacitance

Xs Series 
Xs 300 300 watt mono & power supply– $85,000.00 pr

The Xs series monoblock power amplifiers represent the reference-quality, state-of-art amplifiers from Pass Laboratories. Through years of “spare no effort” endeavor, they represent the true pinnacle of music reproduction. The Xs 300 delivers 300 watts, employs separate power supply and amplifier chassis’ for lower noise and utilizes higher-power constant-current source. Single-ended bias current not only lowers distortion, but facilitates better control of its harmonic structure, tweaked and optimized through endless listening tests for your musical pleasure.

Awards and Reviews  

Editor’s choice award 2017

The Absolute Sound

“Solid State Product of the Year”

-Tone Audio- USA  

“Best Performance of the Year 2014”

-Audio Art- Taiwan  

“Best Products of the year 2013 Award”

-hometheaterhifi.com- USA  

“Some might even proclaim them as the very best”

Positive Feedback  

“The end result is musically realistic and involving at every level.”

The Absolute Sound  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output/ch (8 ohm) 300
Distortion, (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 100
Power Consumption (Watts) 900
Temperature (deg C.) 53
Number of Chassis 2
Unit Dimension (W x D x H) (In.) 19 x 27.5 x 11 x 2
Unit Weight (LBS) 134 / 172

Xs 150 150 watt mono & power supply $65,000.00 pr

Like the Xs 300, this amplifier was developed through constant and thorough innovation. After years of SIT device experimentation, followed by deployment in Nelson’s First Watt designs, circuit modification captured the unique tube-like sonic footprint of SITs from much higher-output MOSFET devices used in the Xs series. The result is unparalleled, fatigue-free listening enjoyment.

Awards and Reviews  

“Best Performance of the Year 2014”

-Audio Art- Taiwan

“Super Class A Presentation,Super Class A Price Tag!”

Everything Audio Network  

“Even straight from the box, they sounded very good”

Dagogo.com  

Circuitus Maximus Award 2017

Positive-Feedback  

Top o’ the line Brutus Awards 2017

Positive-Feedback  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output/ch (8 ohm) 150
Distortion, (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 100
Power Consumption (Watts) 700
Temperature (deg C.) 53
Number of Chassis 2
Unit Dimension (W x D x H) (In.) 19 x 21.5 x 11 x 2
Unit Weight (LBS) 102 / 132

“XA.8” Pure Class “A” High Current Series

point8_stack_sm copy

XA200.8 – 200 watt class A mono block – $42,000 pr

Are fabulous-sounding 400-watt-plus per channel class-A peaks attainable without loss of the musical detail or audible meltdown? Yes, through repeated listening tests and continual technical innovation that push performance standards, the XA200.8 achieves what most amplifiers can only dream about. Even for the most demanding, complex musical passages in larger rooms at high sound pressure levels, this model offers headroom to spare.

Awards and Reviews  

“Pass Labs XA200.8 Pure Class A”

Dagogo  

“Without hesitation, I could go the rest of my life and never feel the need to upgrade from the Pass XA200.8 amplifiers.

Tone Audio #84 / Greg Petan  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.00
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 200
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 6.3
Power Consumption (Watts) 760
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimension (W x D x H) (In.) 19 x 27.5 x 11
Unit Weight (LBS) 157

XA160.8 160 watt class A mono block – $27,300 pr

More of just about everything: 72 output power-MOSFETs, higher input impedance, higher capacity power supply and the ability to deliver over 320 watts per channel in class A with greater dampening. The 160.8’s deliver power and finesse in spades. Voices take on shape and depth, piano notes arrive with full acoustic integrity and the rest of the rhythm section is delivered with both powerful attack and holographic sustain. The effortless conveyance of musicality and realism must be heard to be believed.

Awards and Reviews  

“You must audition the XA160.8 I guarantee you will be highly impressed”

Tone Audio  

Editors’ Choice Award 2017

The Absolute Sound

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.79
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 160
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 4.8
Power Consumption (Watts) 580
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.5 x 11
Unit Weight (LBS) 123

XA100.8 100 watt class A mono block – $20,300 pr

The middle sibling of the XA.8 series, the XA100.8’s realize a muscular yet highly refined sonic profile. Like all Pass Laboratory’s power amplifiers, they features both single-ended and balanced inputs, Furutech five-way binding posts and a convenient ground terminal for safe subwoofer connection. Improved constant-current sourcing, precise voltage references and current-feedback all represent new benchmarks in state-of-art amplifier design. The result is a larger, more realistic soundstage, sharper transient response and the prized ability to reach concert-hall dynamics and realism without strain.

Awards and Reviews  

“They’re so versatile and rewarding that it would be hard to praise them enough.”

Part Time Audiophile  

“It would be tragic if you pulled the trigger on another brand/model and then happened to hear what this magnificent beast can do”

Canada Hifi  

“Ignite the imagination and accelerate your heart rate to thousands audiophiles worldwide”

Sound Rebels  

Parttime audiophile Editors Choice

Parttime Audiophile  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.41
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 100
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.5
Power Consumption (Watts) 420
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 9
Unit Weight (LBS) 99

XA60.8 60 watt class A mono block – $13,500 pr

Offering all the sonic benefits of the .8 amplifier line, a pair of XA60.8’s also grace the listener with mono-block performance: dedicated power supplies for each channel, dedicated circuitry for each channel and dedicated chassis’ for each channel offer a cleaner, better defined image and soundstage. Beautiful to the ears and eyes, this model achieves levels of focus and intimacy normally associated with the finest tube amplifiers. The XA60.8’s do all of this while providing greater control and power.

Awards and Reviews  

“Rock-solid dependability, never needing repair”

Home Theater Review  

“There are speakers that need more power and the XA60.8 is the choice”

Dagogo  

“So then, you might ask, what is the Pass Labs “family” sound? Different people hear things differently, but for me, it goes something like this: it’s somewhat warm, well-balanced top to bottom, dimensional, and forgiving, all while demonstrating prodigious bass.” John Richardson

parttimeaudiophile.com  

“The improvements rendered by the Pass Labs XA60.8s weren’t only in the soundstage; the sound was now, when called for, sweeter, warmer, more delicate—as, for example, with the voices and tenor sax on Getz/Gilberto, an oh, so familiar recording I explored with new interest with the XA60.8s in the system.” Jim Austin

Stereophile  

Technical specifications  

Class A
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.10
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 60
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.3
Power Consumption (Watts) 400
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

XA30.8 30 watt per channel stereo- $6,800

An exceptional stereo power amplifier on many levels — high-biased MOSFETs providing higher-power class A operation, direct-coupled front-end circuitry for exceptionally high stability and larger, more robust heats sinks similar to those of the larger .8 amplifiers. The list goes on, but listening may tell you the XA30.8 represents a value high-point — quite possibly your particular optimal balance between performance and cost.

Awards and Reviews  

HomeTheaterReview – Best of 2016 Award

HomeTheaterReview

“For me, listening to the XA30.8 is not unlike the first time I heard a really great stereo system; it is different, alive, and fantastic”

Positive Feedback  

Writers’ Choice Award, 2015

Positive Feedback

“This would be my first exposure to the grown-up stuff of Pass Labs”

6moons  

“The Pass Labs XA30.8 excelled at musical flow”

Dagogo  

“A pure conduit for music you ask? It truly is, and you must go and listen”

Enjoy The Music  

“It has everything you could ever want”

Home Theater HiFi  

Another stunning review of the XA30.8, available in Tone Audio #78 page 182

Tone Audio

“You can sit for hours enjoying the tube-like, highly detailed musical nature of the XA30.8 with virtually no listening fatigue”

Home Theater Review  

Technical specifications  

Class A
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 0.77
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 30
Distortion (1 KHz, full power) 1%
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.3
Power Consumption (Watts) 400
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

“X.8” High Voltage Series Amplifiers 

Point8_stack_45_sm copy

X600.8 600 watt mono block – $27,300 / pr

X600.8_fire_place copy

The X600.8 monoblock amplifiers deliver 600 watts into 8 ohms. Even more impressive they effortlessly drive the most demanding loudspeakers to musical nirvana, be the performance full scale orchestra, high-decibel rock band or string quartet. Exhaustive listening tests, not myopic focus on specifications have informed the development of this and the rest of the Pass Labs product offering, and you can hear it.

Awards and Reviews  

“Solid build quality”

hometheaterhifi.com  

Technical specifications  

Class AB
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 3.46
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 600
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 200
Output Noise (uV) 200
Current Draw @ Idle (Amps) 4.6
Power Consumption (Watts) 550
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimension (W x D x H) (In.) 19 x 21.5 x 11
Unit Weight (LBS) 123

X260.8 260 watt mono block – $13,500 / pr

The X260.8 is a refined musical instrument delivering 260 watts into 8 ohms, and combines power and finesse with all the benefits of mono-block performance. Its measured performance – distortion, bandwidth, noise, and resolution is beyond reproach. Like all of the class A/B .8’s, this amplifier has some class A bias, rewarding its listeners with a whole new zenith of sound quality.

Technical specifications  

Class AB
Type Mono
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.2
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 260
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.1
Power Consumption (Watts) 375
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

X350.8 350 watt per channel stereo – $14,200

At 350 watts per channel class A/B, the X350.8 is the largest and most powerful stereo power amplifier of Pass Labs line-up. Because we care more about how holistic design affects the musical experience and relatively less about how parts affect specifications, you can expect superb and accurate representation of the recording performance and venue, as well as the distinctive layering of instruments captured faithfully.

Awards and Reviews  

“This is a high-powered, audiophile amp that delivers the desired sound”

Everything Audio  

“A superb example of the Pass Labs commitment to trickle down product development”

Positive Feedback  

Positive Feedback Writers Choice Award

Positive Feedback  

Technical specifications  

Class AB
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.65
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 350
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 4.6
Power Consumption (Watts) 550
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.5 x 11
Unit Weight (LBS) 127

X250.8 250 watt per channel stereo – $10,000

This stereo class A/B model represents a step up in power and performance from the X150.8 and, like all of our products, has been painstakingly designed, tweaked, redesigned and fine-tuned to deliver maximum musical enjoyment. This hard work and creativity results in a greater “look-back” at the original musical performance, conveying additional insight to the artist’s creative intent. Isn’t that what it’s all about?

Awards and Reviews  

“Best of 2015 Awards”

-Home Theater Review- USA  

“This generation of Nelson Pass designs is the best that Nelson and his team have created so far.”

Home Theather Review  

“It has been my pleasure to experience the X250.8 as it was another great performer!”

Enjoy The Music  

“It’s probably the best sounding power amp I’ve had the pleasure of using in my system up to this time.”

Paul  

“With the X250.8 there’s detail, but there’s also texture.”

Part-Time Audiophile  

“An amplifier that viscerally connects you to the heart and soul of the musician(s) you are listening to”

Connoisseur Corner  

“Build quality is top shelf and the design has just enough subtle “audio jewelry” to delight the audiophile crowd”

Connoisseur Corner  

Technical specifications  

Class AB
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 2.24
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 250
Distortion, (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 3.4
Power Consumption (Watts) 450
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) (In.) 19 x 21.25 x 9
Unit Weight (LBS) 100

X150.8 150 watt per channel stereo – $6,750

As the entry-level class A/B stereo power .8 amplifier, the X150.8 features many of the same technical and sonic attributes of its larger brethren. It features 150 watts per channel, 100K ohm input impedance and operates “higher” into Class A than its predecessors. But knowing the ear is not a microphone and the brain is not a tape recorder, we’ve designed this model to bridge the gap between measured performance and outstanding subjective musical experience. Simply put, the X150.8 will compel you to listen to your entire music collection again and again.

Technical specifications  

Class AB
Type Stereo
Gain (dB) 26
Full Pwr @ 26 dB gain (V) 1.73
Low Frequency Response 1.5 Hz
High Frequency Response 100 KHz
Power Output /ch (8 ohm) 150
Distortion (1 KHz, full power) 1%
Input Impedance (SE & BAL Kohms) 50/100
Damping Factor 150
Output Noise (uV) 200
Current Draw @ Idle (Amps) 2.9
Power Consumption (Watts) 375
Temperature (deg C.) 53
Number of Chassis 1
Unit Dimensions (W x D x H) 19 x 21.25 x 7.5
Unit Weight (LBS) 88

XA Series

Class A

Entering their 22nd year of production, the X and XA power amplifiers have remained at the cutting edge of audio through continuous innovation and refinement. At Pass we build amplifiers with excessive output stages, huge heat sinks and massive power supplies. We use the highest quality components in simple linear topologies, assembled and tested with great care in Auburn, California. They measure well and sound great. They are heavy, reliable and expensive.

Awards and Reviews  

“As I listened to album after album, I could hear the textures, colors, tones, and harmonics of music in a way that was very moving. The system’s timbre realism with individual instruments and voices was as satisfying with the XA25 as it had been with any amp. All of this added up to enable my system to play music with a wonderful lifelike flow.” Jack Roberts

http://theaudiobeatnik.com  

Technical specifications  

Gain 20 dB gain
Output Power 25 Watts rms @ 8 ohms 50 Watts rms @ 4 ohms
Distortion 0.1% @ 25 Watts, 8 ohms, 1 KHz
Class A envelope 50 Watt peak for 2, 4 or 8 ohm load
Bandwidth DC to -2 dB @ 100 KHz
Noise Less than 50 uV output, unweighted 20 to 20 KHz
Damping Factor 500
Slew rate 100 V/uS
Input Impedance 47 Kohm
Peak Current 10 Amp output (200 Watt peak into 2 ohms)
Protection Shutdown at 10 amps output
Idle Power draw 2.0 Amps @ 120 VAC (240 Watts)

Integrated Amplifiers 

Audiophiles, serious Audiophiles, have not considered an integrated amplifer as worthy product for 30+ years. Pass Labs has changed this paradigm, forever!

Operational points
optimized for higher wattage requirements

Greater versatility

Stable
into any concievable load

Spectacular with difficult speaker loads

INT-250 250 watt Integrated – $12,000

Like the INT-60, the INT-250 utilizes the synergies developed in the .8 series power amplifiers. Unlike the INT-60, however, it brings 250 watts per channel of listening pleasure. With higher power MOSFETs and more of them, the INT-250 drives large, demanding and relatively inefficient loudspeakers at higher volumes without batting an eyelash, singing beautifully. Just incredible music from one component.

Awards and Reviews  

Editors Choice Award – 2017

The Absolute Sound

Best Performance of the year – 2017

Audio Art – Taiwan

Integrated Amplifier of the Year – 2016

The Absolute Sound

“The INT-250 also throws its prodigious weight around in the most unexpected and tender ways.”

The Absolute Sound  

Brutus Award

Postive Feedback

Technical specifications  

Class AB
Type Stereo
Gain (dB) 30/36
Volume control (1dB steps) 63 dB
Remote Yes
Inputs 4
Outputs 2
Frequency Response -6 dB @ 80 KHz
Power Output /ch (8 ohm) 250
Distortion, (1 KHz, full power) 1%
Input Impedance (Kohms) ea Leg 45
Damping Factor 150
Output Noise (uV) <250
Input CMRR (dB) -60
DC Offset (V) 0.05
Leaves Class A pk 15
Power Consumption (Watts) 450
Dimensions (W x H x D) 19 x 21.25 x 9.1
Weight (LBS) 105

INT-60 60 watt Integrated – $9,000

INT-60_on_desk

This integrated amplifier sets a new benchmark in significantly narrowing any perceived performance gap between separate components and integrated amplifiers. Advanced technologies and real-world testing combine to create the INT-60 which presents 60 glorious watts per channel into 8 ohms, and doesn’t leave class A until 30 watts thanks to its high-bias operation. This larger class A operating envelope brings lower distortion and greater loudspeaker control, delivering higher quality musical fidelity for your enjoyment.

Awards and Reviews  

So what does the INT-60 sound like? I’m sure this is too simplistic, but it sounds like music.

Positive-Feedback  

“Distilling it all down, it’s an amplifier that makes me happy because it gets me more involved and closer to the musical experience.”

Part-Time Audiophile  

“The INT-60’s dominant trait was to suck me in and glue me to my seat as it continued to reproduce music with so much low-key flavor, natural color, and more-ishness that I could never play just one record and go to bed early. ”

Stereophile  

“Writers’ Choice Award 2015”

Positive Feedback  

“I strongly recommend that you check out this remarkable audio achievement.”

Positive Feedback  

“Technical progress and music fun”

Music Emotion  

Constitutes the heart of the integrated amplifier

Report magazine  

Writers’ Choice Award, 2015

Positive Feedback  

“if you want to hear beautiful music produced by an integrated amplifier that is built to last a life time and is one handsome-looking beast without constantly messing with your system, the Pass Labs INT-60 integrated amplifier is for you.”

HomeTheaterReview.com  

“The INT-60, indeed, is one of the best sounding integrated preamp/amplifiers I have ever reviewed. It is tough to better the INT-60 with separates in this price range. Even if you spend a bit more, you probably will not top it. Incredible detail, width and depth in the expansive stereo image, plus quick bass response.” John Gatski

Everything Audio Network  

Everything Audio Network – Stellar Sound Award

  

Writers Choice Awards 2017

Positive-Feedback  

Technical specifications  

Class AB
Type Stereo
Gain (dB) 29/35
Volume control (1dB steps) 63 dB
Remote Yes
Inputs 4
Outputs 2
Frequency Response -6 dB @ 80 KHz
Power Output/ch (8 ohm) 60
Distortion (1 KHz, full power) 1%
Input Impedance (Kohms) ea Leg 45
Damping Factor 150
Output Noise (uV) <250
Power Consumption (Watts) 375
Temperature (deg C.) 53
Dimensions (W x H x D) 19 x 21.2 x 7.6
Weight (LBS) 93

INT-30A 30 watt Integrated – $7,500

 

Headphone Amp

HPA-1 SE Headphone Amplifier – $3,500

 

Class A

Announcing the new Headphone Amp from Pass Labs!

Like the XP preamplifiers, the HPA-1 is the result of great attention to detail.

Starting at the power cord, the AC line is first filtered for high frequency noise and then isolated by a special toroidal transformer shielded by mu-metal for lower magnetic noise and shielded for electrostatic noise by a separate Faraday shield, grounded to analog ground. This is followed by fast/soft recovery rectifiers, generous CRC passive filtering and sophisticated discreet DC regulators and then more passive RC filters.

Works with headphones
with impedances of 15 ohms to 600 ohms

Low feedback wide bandwidth discreet design.

Class A
direct coupled Mosfet output stage

Custom low noise Torodial power transformer
with a Farady shield

Discreet regulated power supply for audio circuits.

The HPA-1 headphone amplifier was designed ground-up to become what we believe is one of the very best sounding headphone amplifiers available today. With low feedback, wide bandwidth and a direct coupled MOSFET output stage, this musical instrument drives even the most difficult headphone loads with ease, power and grace. The HPA-1 also functions as a line-level preamplifier that sonically rivals much higher-priced competition. The measured performance is superb and the sound even better.

Awards and Reviews  

“To put it bluntly, Pass Labs HPA-1 is an exceptional, very addictive headamp/preamp combo every aficionado should at least audition once an opportunity strikes.”

HiFi Knights  

” If I did not know that the HPA-1 was transistor-based, I would’ve been fooled: the HPA-1 had the natural warmth and slight fullness that mimic tubes.” ” In my view, headphone listening is about intimacy, and the HPA-1 is nearly perfect in this regard.”

HometheaterReview.com  

“As far as headphones go, the HPA-1 is a brilliant amp which deserves every bit of praise I’ve thus far heaped on it.”

Part-Time Audiophile  

Headphone Amplifier of the Year – 2016

The Absolute Sound

Best Headphone Amplifier – Best of Awards – 2016

HomeTheaterHiFi

“One Of The Best HPAs In The Audiophile World!”

Everything Audio Network  

“The HPA-1 had an effortless quality that made recorded music sound more like the real thing.”

CNET  

“Pass Labs, one of the most prestigious names in audio, has launched a terrific headphone amplifier”

Home Theater HiFi  

“in bass clarity and authority and in midrange transparency, the Pass Labs HPA-1 is without peer”

Stereophile  

“The Pass HPA-1 is on the top tier of the world’s finest headphone amplifiers”

Tone Audio  

“This thing sounds so damn good twenty minutes out of the box”

Tone Audio  

“An amplifier that drives headphones to exceptional performance”

alpha-audio.nl  

“The best I’ve heard from a headphone amp anywhere near the HPA-1’s price.”

Enjoy The Music  

“the Pass Labs HPA-1 is a bona fide muscle amp in the guise of an equal-opportunity preamp with headfi function.”

6Moons  

“Dynamics and authority are two of the best qualities in all listening sessions with the HPA-1, regardless of the headphone. With a great current delivery it also drives any planarmagnetic headphone, with an absolute control.”

www.oldnewsound.es  

Technical specifications  

Gain (dB) 8 dB
Power Consumption (W) 23
Output Power into 20 ohms 3500 mW
Output Power into 300 ohms 200 mW
Frequency Response 10hz -100k -1 dB
THD + Noise < 0.005 at 1V out
Input Impedance 50K Ohm
Output Impedance < 2 ohms

SIT-1 Power Amplifier 

– pure class “A” single end 10 watts – $10,000 / pr

The SIT-1 is the first of a new generation of power amplifiers using Static Induction Transistors (SIT) in single-stage, single-ended Class A circuits delivering superlative sound without feedback or degeneration. This is made possible by the unique characteristic of First Watt’s custom SIT devices, which combines a square-law input character with a low impedance output to form the only solid state gain device which behaves like a Triode tube.

This character has long been sought as a potential replacement for tubes, but the realized devices have several advantages. The Pass SIT device has higher gain and lower distortion and also conveniently operates at the voltages and currents required by loudspeakers. This means that an output transformer, with all its bandwidth and distortion limitations is eliminated.

The owner’s manual can be downloaded in pdf format here: SIT-1 Owner’s Manual

You can read more about SITs here: SIT Introduction

The SIT-1 has only one active device in the circuit. All the other components are passive, as illustrated in the following diagram:

In this circuit, the signal is presented at the Gate of the SIT and appears at the output with a voltage gain of about 18 dB. The input impedance is about 47000 ohms, and the output impedance is about 4 ohms, or a current gain of about 10,000 to 1.

There are other amplifiers which operate without negative feedback loops for the purpose of improving performance, but it is a poorly understood fact that the bulk of them use degeneration on the gain devices to improve the performance, which is widely regarded as just another form of feedback.

The SIT-1 uses neither loop negative feedback nor degeneration. As a result, the sound of the amplifier entirely reflects the character and chosen operating point of this single device. It is no exaggeration to say that the amplifier speaks with a single voice. Nevertheless the measured performance is quite good compared to the single-ended tube circuits (SETs) operated with multiple stages and feedback:

The distortion is second harmonic in character, and this is constant across the audio band. The frequency response is flat from 1.5 Hz to 200 Khz. The amplifier operates at 200 watts, and is designed to operate with loads from 4 ohms to 16 ohms.

Because the unique character of the SIT device is a function of the voltage/current values (“load-line”) it experiences with a load, the SIT-1 amplifier has been equipped with an adjustment to help optimize the performance with different loudspeakers. A knob on the front panel is used to tweak the operating point of the gain device as indicated by a meter display. It is this feature which further distinguishes the monoblock SIT-1 from the stereo SIT-2, as it allows the last bit of performance refinement.

It’s interesting to try to describe the effect of this amplifier on the performance of high sensitivity loudspeakers. The sound is fast but very smooth, with a very organic, musical character. The spatial presentation is very three dimensional, with exceptional localization. You will find it easy to “drill down” so as to focus on individual instruments in an ensemble. Also, the amplifier appears to have more power than it’s rating suggests, as the overdriven characteristic is very soft.

A typical critical comment:

The amp sounds “big”. There is a large, open sound stage that fills the room, that is the first thing that you notice when the amp is plugged in. The effect is a little intoxicating. …the SIT seems to bring a lot more control & detail to the speaker. The tube sweetness is present, yet the presentation is very clean. This is like a very nice low distortion SET. The SIT presents details, but with proper dynamic contrast. Details do not poke you in the eye, they just naturally unfold as part of the music.

You can also read some commentary describing the prototype SIT-2 in 6moons.

 

SIT-2 Stereo Amp – pure class “A” single end 10 watts – $5,000

 

SIT-2 Power Amplifier

The SIT-2 is the first of a new generation of power amplifiers using Static Induction Transistors (SIT) in single-stage, single-ended Class A circuits delivering superlative sound without feedback or degeneration. This is made possible by the unique characteristic of First Watt’s custom SIT devices, which combines a square-law input character with a low impedance output to form the only solid state gain device which behaves like a Triode tube.

This character has long been sought as a potential replacement for tubes, but the realized devices have several advantages. The Pass SIT device has higher gain and lower distortion and also conveniently operates at the voltages and currents required by loudspeakers. This means that an output transformer, with all its bandwidth and distortion limitations is eliminated.

You can download the owner’s manual here: SIT-2 Owner’s Manual

You can read more about SITs here: SIT Introduction

The gain of the SIT-2 is the result of the single gain device in the circuit, the Pass SIT transistor. The other semiconductors form a nearly constant current source, as illustrated in the following diagram:

In this circuit, the signal is presented at the Gate of the SIT and appears at the output with a voltage gain of about 18 dB. The input impedance is about 47000 ohms, and the output impedance is about 4 ohms, or a current gain of about 10,000 to 1.

There are other amplifiers which operate without negative feedback loops for the purpose of improving performance, but it is a poorly understood fact that the bulk of them use degeneration on the gain devices to improve the performance, which is widely regarded as just another form of feedback.

The SIT-2 uses neither loop negative feedback nor degeneration. As a result, the sound of the amplifier entirely reflects the character and chosen operating point of this single device. It is no exaggeration to say that the amplifier speaks with a single voice. Nevertheless the measured performance is quite good compared to the single-ended tube circuits (SETs) operated with multiple stages and feedback:

The distortion is second harmonic in character, and this is constant across the audio band. The frequency response is flat from 1.5 Hz to 200 Khz. The amplifier operates at 200 watts, and is designed to operate with loads from 4 ohms to 16 ohms. The character of the SIT device is a function of the voltage/current values (“load-line”) it experiences with a load and the SIT-2 amplifier has been adjusted for most optimal sound in the region around 8 ohms.

It’s interesting to try to describe the effect of this amplifier on the performance of high sensitivity loudspeakers. The sound is fast but very smooth, with a very organic, musical character. The spatial presentation is very three dimensional, with exceptional localization. You will find it easy to “drill down” so as to focus on individual instruments in an ensemble. Also, the amplifier appears to have more power than it’s rating suggests, as the overdriven characteristic is very soft.

A typical critical comment on the sound:

The amp sounds “big”. There is a large, open sound stage that fills the room, that is the first thing that you notice when the amp is plugged in. The effect is a little intoxicating. …the SIT seems to bring a lot more control & detail to the speaker. The tube sweetness is present, yet the presentation is very clean. This is like a very nice low distortion SET. The SIT presents details, but with proper dynamic contrast. Details do not poke you in the eye, they just naturally unfold as part of the music.

You can also read some commentary describing the prototype SIT-2 in 6moons.

Regular production starts in December 2011 and is expected to be delivered in late January 2012.

The owner’s manual will be posted on-line as soon as it is completed.

J2  Stereo Amp – pure class “A” single end 25 watts Jfet- $4,000

First Watt J2

J2 Power Amplifier

The J2 is a stereo power amplifier rated at 25 watts per channel. It has a two-stage circuit that operates in pure single-ended Class A mode, with signal JFET devices forming the input stage and power JFET devices for the output stage.

JFET transistors have long been recognized as having the highest audio quality of any transistor; the input devices of the J2 are known through the industry as the standard for low noise and linearity, and are found on the inputs of the finest phono stages, line level preamplifiers, and power amplifiers.

But for over 30 years robust power JFETs have not been widely available since the short-lived efforts of Sony and Yamaha. In the last few months, advances in Silicon Carbide (SiC) technology have resulted in new power JFET transistors with high voltage, current, and power capabilities – as high as 1200 volts, 30 amps, and 273 watts.

Created by SemiSouth Corporation of Mississippi, these robust new JFETs are designed for very fast high power switching in solar power and electric car applications. However, they also have a very low distortion characteristic that makes them superb for use in linear amplifiers. In apples-to-apples comparisons with comparable MOSFET type power transistors, they can achieve 10 to 20 dB improvements in distortion performance.

For over 10 years First Watt has been pushing the design envelope with simple high performance Class A amplifier circuits, and when a better transistor like this comes along, it can mean getting the same distortion performance with a lot less feedback, or lower distortion with the same amount of feedback. The J2 does amplifier does both,and that helps make it a better sounding amplifier than the best of its predecessors.

F7  Stereo Amp – pure class “A” push pull 20 watts – $3,000

 

F7 Power Amplifier

The F7 is a very unique power amplifier, a two-stage push-pull JFET/MOSFET

topology with fewer parts than any First Watt amplifier to date and incorporating

a very interesting balance of very low negative voltage feedback and a little bit of

positive current feedback to give an astonishing measure of control over reactive

loudspeaker loads.

The F7 is now in production.

The owner’s manual can be downloaded here: F7 Owner’s Manual

Here is a link to the first of many reviews: F7 at 6moons

Availability is March 2016 at a list price of $3000.

F6 Stereo Amp – pure class “A” push pull 25 watts – $3,000


PS Audio


 

BHK 250$7,499.00

 

BHK 300 (pr) –  $14,999.00

Bascom H. King’s magnum opus featuring a vacuum tube input with a powerful MOSFET output capable of either 250/500 wpc in the Stereo 250, or 300/600 watts in the Mono 300. Differentially balanced from input to output. Running everything in parallel, the mono offers double the current for tough loads and a more lifelike sound. Available in silver or black.

Steller S300 Amplifier$1,500

psaudiostack

Steller M700 Amplifier$3,000

Sprout – $499.00
An amp for the modern home. 50W per channel amplifier, passive EQ moving magnet phono preamp, low output impedance headphone amp. 192kHz/24 bit asynchronous DAC. Bluetooth, USB, coax, analog inputs accepted. True analog stepped volume knob.

 



Arcam

FMJ Power Amplifiers

P49 –  $5,000.00

reference 2 channel power amplifier

  • ‣  special order, allow 3-4 weeks
  • ‣  class-G amplification w/ pure class-A to 50WPC
  • ‣  acoustically damped chassis
  • ‣  fully balanced
  • ‣  200WPC@8ohm,400WPC@4ohm
  • ‣  bridged: 1100 WPC @ 4 ohm
  • ‣  stable to 2 ohms (stable to 3 ohms bridged)
  • ‣  singled ended RCA and balanced XLR inputs
  • ‣  weight: 39.6 lb. (18 Kg.), 43.3 lb. (19.7 Kg.) packed
  • ‣  dimensions (including feet and speaker outputs):  17.05” (433mm) W x 16.73” (425mm) D x 6.73” (171mm) H

353_thumb

P349  $5,750.00

reference 3 channel power amplifier

  • ‣  special order, allow 3-4 weeks
  • ‣  identical specs to P49
  • ‣  180 WPC @ 8 ohm, all channels driven
  • ‣  weight: 39.6 lb. (18 Kg.),43.3 lb. (19.7 Kg.) packed
  • ‣  dimensions (including feet and speaker outputs):

17.05” (433mm) W x 16.73” (425mm) D x 6.73” (171mm) H

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P429 $2,500.00

4 channel class-G power amplifier

  • ‣  all channels driven, 4Ω/8Ω, 20Hz–20kHz 125W/90W
  • ‣  One channel driven, 4Ω / 8Ω, 1kHz 180W/110W
  • ‣  BR (bridged) mode
  • ‣  Two channels driven, 8Ω, 20Hz–20kHz 270W
  • ‣  One channel driven, 8Ω, 1kHz 320W
  • ‣  weight: 20.2 lb. (9.2 Kg.), 23.5 lb. (10.7 Kg.) packed
  • ‣  dimensions (including feet and speaker outputs):

17” (433mm) W x 10.8” (275mm) D x 3.4” (85mm) H

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FMJ Integrated Amplifiers

A49 $5,750.00

Arcam’s highest performing integrated amp ever Class G amplification with 50W of class A operation toroidal transformer
acoustically dampened chassis

dual mono volume control
fully balanced input-to-output
paralleled transistor output stages
6 line level RCA inputs
1 balanced XLR input
selectable unity gain (theater bypass)
on-board phono input configurable for line or MM RCA and balanced XLR pre-outputs
RCA record output
headphone output 200WPC@8ohm,400WPC@4ohms
2 ohm stable
on-board 6V PSU for rSeries products
multi-function remote control
weight: 43.3 lb. (19.7 Kg.), 47.1 lb. (21.4 Kg.) packed dimensions (including feet and speaker outputs): 17.05” (433mm) W x 16.73” (425mm) D x
6.73” (171mm) H

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A39 $2,700.00

compact high performance integrated amplifier Class G amplification with 20W of class A operation toroidal transformer
acoustically dampened chassis

paralleled transistor output stages
6 line level single-ended RCA inputs
on-board phono input configurable for line or MM single ended RCA preout & record output 120WPC@8ohm,240WPC@4ohms
on-board 6V PSU for rSeries products multi-function remote control
weight: 25.3 lb. (11.5 Kg.), 29 lb. (13.2 Kg.) packed dimensions (including feet and speaker outputs): 17.05” (433mm) W x 16.73” (425mm) D x
3.94” (100mm) H

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A29 $1,600.00

compact mid-level integrated amplifier class G amplifier
toroidal transformer
acoustically dampened chassis

6 line level single-ended RCA inputs
on-board phono input configurable for line or MM single ended RCA preout & record output 80WPC@8ohm,140WPC@4ohms
on-board 6V PSU for rSeries products multi-function remote control
weight: 20.2 lb. (9.2 Kg.), 23.5 lb. (10.7 Kg.) packed dimensions (including feet and speaker outputs): 17” (433mm) W x 10.8” (275mm) D x 3.4” (85mm) H

Solo Series Components, Speakers & Subs

Solo Movie $3,000.00

‣ compact 5.1 receiver with BluRay disc player ‣ class G amplification
‣ Apt-X Bluetooth w/ Bluecore technology
‣ WiFi wireless internet

‣ UPnP/DLNA/Internet Radio capability for streaming audio and video from network devices (NAS)

‣ 4 HDMI inputs, 1 HDMI output
‣ 1 coax digital, 1 TOSLINK optical input
‣ 1 line level RCA input, 1 3.5mm input
‣ FM tuner onboard
‣ subwoofer output
‣ 60 WPC @ 8 ohm, all channels
‣ 75 WPC @ 4 ohms. all channels
‣ multi-function remote control
‣ automation via IP, RS232, IR & 12V trigger
‣ weight: 20.2 lb. (9.2 Kg.), 23.5 lb. (10.7 Kg.) packed ‣ dimensions (including feet and speaker outputs):

16.5” (420mm) W x 16” (400mm) D x 3.4” (85mm) H ‣ graphite finish

 

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Wyred4Sound


Mono-Block Amplifiers

SX-1000R$1,799 ea

mAMP$999 ea

Stereo Amplifiers

ST-500 mkII$1,499 

ST-1000 mkII$1,999

Multi-Channel Amplifier

MC7150 (150w X7) $1,599

Integrated Amplifiers

STI-500 v2 $2,499

STI-1000 v2$2,999

mINT$1,499

CONTACT

Mike Phalan | Audio Expert 

gestalthifi@gmail.com      

18599 HWY 84/285, 87532

(808) 640-8947

 

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