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The Isis integrated amplifier and the DAC1
ULTIMATE SOUND MACHINES
The Isis
| The Isis range of dual channel amplifiers from Analog domain represents the current state of the art in linear amplification technology. It is the result of 15+ years experience in high-performance amplifier circuit design, created to deliver exceptional performance at an attractive price point.The Isis features our recently disclosed proprietary Excalibur circuit. Near-zero distortion, a noise floor well below the human perceptual threshold and the generous power output capability of the Excalibur give the Isis its ability to amplify signals with extreme resolution and control, raising the enjoyment of music to an unprecedented level.The Isis is available in two configurations: an integrated amplifier and a matching 2-channel power amplifier. Both can be configured as monoblock amplifiers, for installations requiring more power in stereo, or for building multi-way systems with frequency splitting, or in multi-channel systems. Isis M75D – Stereo integrated amplifier, stepped analogue volume attenuator, remote controlIsis M75P – Stereo power amplifier SPECIFICATIONSParameter ConditionIsis M75DIsis M75P Power output8 ohm, sine wave, rms4 ohm, sine wave, rms8 ohm, bridged, music material250W400W500WPower output 8 ohm, sine wave, rms250W 4 ohm, sine wave, rms400W 8 ohm, bridged, music material500W 4 ohm, bridged, music material1000W Damping factor 1kHz, 4ohm load, single-ended >1000 1kHz, 4ohm, bridged mode>500 THD+N20kHz BW, 8ohm, nom. power<0,002% <0,001%THD+N 20kHz BW, 4ohm, 1W output<-93dBr <-95dBr Power bandwidth 2 ohm, THD<0.1%5Hz-50kHz Peak current 50A Noise output 20kHz BW, rms<35uV <25uV Dimensions, mmIncluding feet and rear handles440W x 454D x 123H With packaging560W x 560D x 200HNet weight ~25kg Owners’ manual Isis М75DOwners’ manual Isis M75P |
The DAC1
The DAC1 is available in two versions – with or without volume control. The volume control is implemented as a precision, analog stepped logarithmic attenuator. The output volume is adjusted without affecting signal quality. Having volume control at the source enables the use of power amps, eliminating the need for a preamplifier.We’d like you to relax while listening to your favorite music instead of fumbling around with complicated and often meaningless settings, or worrying about numbers. We’ve done it for you while designing the DAC1. Our goal is to maximize the enjoyment of music from digital sources. 
The design differs from the mainstream, as can be seen from the block diagram: |
A driver is required for windows based systems only. Download here
The Apollo
The Apollo is the most powerful member of the DX9 range. It is housed in our M4 chassis. Rated at 4,000W into 8 ohms and 8,000W into 4 ohms, the Apollo is one of the most powerful amplifiers ever built for home use, designed for precise amplification of audio signals in demanding installations.The output stage features 100 high-performance audio-grade power transistors with a peak output current capacity of 720 amperes.The high power output of the Apollo makes it especially suitable for driving the subwoofer/LF channel in a high-performance split system. SPECIFICATIONSInput sensitivity:1.55 VrmsInput impedance:10 kohmVoltage gain:+41 dB or +26 dB, switch-selectablePeak power output:4kW/8ohm; 8kW/4ohm; 2ohm stablePeak output voltage:179 Vac, ±253 VppPeak output current:120 AFrequency range:1Hz–100kHzFull-power bandwidth:5Hz-25kHzMinimum rated load:4ohmDamping factor:> 1000Output noise:< 50uVrmsDynamic range:> 126 dB linear; > 132 dB A-weightedTHD+N:< -92dB (0.0025%)Mains voltage:230/115Vac, factory pre-configuredPower draw:200W idling; < 20W standbyMax current draw:< 16A / 230VInputs:XLR balanced, RCA unbalancedTrigger voltage:12V in, 12V outTrigger input/output:3.5mm jacksDimensions:440(w) x 298(h) x 545(d), mmWeight:~85kg, 115kg shipping |  |
The Athene
The Athene is rated at a peak power of 2,000W into 8 ohms and 4,000W into 4 ohms. It is housed in our M4 chassis and has the same high-current output stage as the Apollo. The Athene is designed for precise full range amplification, capable of sustained high power output. The output stage features 100 high-performance audio-grade power transistors with a peak current capacity of 720 amperes. The Athene can drive any channel in a high-performance split system. SPECIFICATIONS Input sensitivity:1.55 VrmsInput impedance:10 kohmVoltage gain:+38 dB or +26 dB, switch-selectablePeak power output:2kW/8ohm; 4kW/4ohm; 2ohm stablePeak output voltage:126 Vac, ±179 VppPeak output current:120 AFrequency range:1Hz–100kHzFull-power bandwidth:5Hz-25kHzMinimum rated load:4ohmDamping factor:> 1000Output noise:< 40uVrmsDynamic range:> 126 dB linear; > 132 dB A-weightedTHD+N:< -92dB (0.0025%)Mains voltage:230/115Vac, factory pre-configuredPower draw:200W idling; < 20W standbyMax current draw:< 10A / 230VInputs:XLR balanced, RCA unbalancedTrigger voltage:12V in, 12V outTrigger input/output:3.5mm jacksDimensions:440(w) x 298(h) x 545(d), mmWeight:~75kg, 105kg shipping |
The Artemis
The Artemis has a peak power rating of 1,000W into 8 ohms and 2,000W into 4 ohms, housed in our M2 chassis. Its footprint is the same as the M4 chassis, differing only in height. The output stage of the Artemis features 52 high-performance audio-grade power transistors with a peak current capacity of 360 amperes. The Artemis is designed for full range amplification or can be used as the Mid/HF channel amplifier in a high-performance split system. Front panel design is compatible with the Apollo and Athene, allowing amplifiers to be stacked. SPECIFICATIONSInput sensitivity:1.55 VrmsInput impedance:10 kohmVoltage gain:+35 dB or +26 dB, switch-selectablePeak power output:1kW/8ohm; 2kW/4ohm; 2ohm stablePeak output voltage:89 Vac, ±126 VppPeak output current:70 AFrequency range:1Hz–100kHzFull-power bandwidth:5Hz-25kHzMinimum rated load:4ohmDamping factor:> 1000Output noise:< 35uVrmsDynamic range:> 126 dB linear; > 132 dB A-weightedTHD+N:< -92dB (0.0025%)Mains voltage:230/115Vac, factory pre-configuredPower draw:150W idling; < 20W standbyMax current draw:< 8A / 230VInputs:XLR balanced, RCA unbalancedTrigger voltage:12V in, 12V outTrigger input/output:3.5mm jacksDimensions:440(w) x 254(h) x 545(d), mmWeight:~65kg, 95kg shipping Legacy designs |  |
The Calysto
| The Calysto is designed for ultimate fidelity. It features a wider ‘Class A’ operating region in the output stage, providing exceptional resolution in the upper-midrange and high frequencies at low output power levels. The Calysto is especially suited to driving the Mid/HF channel amplifier in a high-performance split system. Front panel design and footprint are compatible with the Apollo, Athene and Artemis, allowing amplifiers to be stacked. SPECIFICATIONSInput sensitivity:1.55 VrmsInput impedance:10 kohmVoltage gain:+32 dB or +26 dB, switch-selectablePeak power output:550W/8ohm; 1.1kW/4ohm; 2ohm stablePeak output voltage:67 Vac, ±95 VppPeak output current:70 AFrequency range:1Hz–100kHzFull-power bandwidth:5Hz-25kHzMinimum rated load:4ohmDamping factor:> 1000Output noise:< 35uVrmsDynamic range:> 126 dB linear; > 132 dB A-weightedTHD+N:< -92dB (0.0025%)Mains voltage:230/115Vac, factory pre-configuredPower draw:150W idling; < 20W standbyMax current draw:< 5A / 230VInputs:XLR balanced, RCA unbalancedTrigger voltage:12V in, 12V outTrigger input/output:3.5mm jacksDimensions:440(w) x 254(h) x 545(d), mmWeight:~64kg, 75kg shipping |
The Argus
Why another loudspeaker?In early 2017, I started looking for a new reference speaker to use in my development work. I need a true reference speaker that can play any music, at any volume, right up to live levels, when required. There are many loudspeakers out there. Some sound very nice and will do a great job when playing at moderate output levels. How about playback at live sound levels? A few can, most will give up long before that.A suitable, ready-made system simply did not exist. Drawing on my experience in building custom monitoring systems for recording studios, the only solution was to build it myself.The prototype pair came into existence in late 2017. Countless hours went into refining the sound – rearranging the crossover, tweaking component values, fine tuning, listening, measuring, listening again, with the objective to achieve three major goals:uncompromised fidelity at any playback levelhigh efficiency and high power handlingminimal distortion and compressionI can now confidently say the Argus is the reference loudspeaker system I have been longing for.How is the Argus different? In almost everything, actually.The Argus is a Mastering reference class, floor standing, three-way, ported loudspeaker system, intended for reproduction of music with maximum fidelity. It is designed for indoor use. Customized high performance drivers and crossover components enable The Argus to play from whisper-quiet up to live sound levels with unrestricted dynamics, minimal distortion and compression. A flat frequency response, excellent time alignment and close matching of the speakers ensure precise timbre and a realistic spatial presentation.Efficiency, impedance and power handlingNominal efficiency of the Argus is 99dB@2.83V, allowing it to be used even with modest amplifiers. The high power handling capacity provides ample headroom for playback up to live sound levels with minimal distortion and compression. The rated impedance is 4 ohms, dipping to 3.5 ohms in the mid-bass range (150-400Hz) and rising above 4 ohms at all other frequencies.Drivers Dual custom 12” long throw woofers ensure a solid foundation in the low frequencies. The powerful Neodymium magnets, triple demodulation rings, a ventilated motor assembly, a high temperature 3” sandwich voice coil and a very rigid cone make these drivers stand out from the crowd.  The 6” midrange driver has outstanding sound quality due to its extremely low distortion, even at high output levels. Its nominal efficiency is a respectable 103dB/W/1m, thus allowing it to deliver the required output at a reduced power relative to the other drivers with minimal compression.  A precision AMT (Air Motion Transformer) driver renders the high frequencies. Its pleated diaphragm has a much larger area relative to dome or cone drivers, thus providing better coupling with the surrounding air. A significant advantage is the absence of inductance. Near-perfect impulse response and no breakup are the hallmarks of this driver. Its radiation pattern is shaped by a custom waveguide to minimize room effects. |  Finishing optionsThe Argus is available in “Brushed Black” and “Brushed Titanium”. Technical specifications Enclosure typeBass reflex type with dual down-firing portsFrequency response +/- 3dB25 Hz-20 kHzNominal efficiency99 dB @2.83V, 1mRated impedance Nominal4 ohm (3.5 minimum)Power handling AES, noise 1’650 WProgram material 2’200 WPhysical Dimensions, cm118(h) x 44(w) x 44(d)Net weight, each65 kg All specifications subject to improvement1) AES power is determined according to AES2-1984 (r2003) standard2 ) Program power rating is measured using a pink noise test signal with 50% duty cycle, applied for 2 hours[i] Compression is the difference between actual output and the anticipated output for a given power input.. |
The Aura
