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  1. question2013 Product Brochures
    2013 - Product Brochures available for download below.
  2. questionCurrent Product Reviews
    Model 825 Stereo Power Amplifier Audiotechnique #385 - October 2013 - by Winson Ng Model 725 Monoblock Power Amplifier theaudiobeat.com - September 2013 - by Roy Gregory hifi-advice.com - August 2013 - by Christiaan Punter The Absolute Sound #228 - December 2012 - by Robert Harley Model 625 Ste ...
  3. questionAeris DAC Review by Christian Rechenbach - Einsnull #313 - July/August 2013
    Please download PDF attachment below:
  4. questionAeris DAC Review by Roy Gregory - Feb 2013
    Please download PDF attachment below:
  5. questionAeris DAC Features and Specifications
    aeris | æ ' ris | n. Nexus of time and space; dynamic gateway between digital and analogue worlds. HYBRID from Latin aerius – ‘air’ or ‘atmosphere,’ and late Latin aera – denoting an epoch from which time is reckoned. TECHNICAL FEATURES Isolated Synch ...
  6. questionSurface-Mount Devices
    All circuitry is implemented using SMD (surface mount devices). Among the many benefits of using SMD is that grounding planes and power planes are not perforated by component pins, which keep the power and grounding planes intact. The additional benefits of SMD components is keeping loop areas ...
  7. question6-layer FR4 PCB Design
    Any analog circuitry is potentially very sensitive to noise emanated by nearby digital logic. So conducted noise from digital circuitry switching must be sufficiently attenuated through high power supply rejection ratio, intelligent printed circuit board (PCB) design, grounding methods, and shie ...
  8. questionPost-regulated Power Rails
    By adding the power supply rejection ratio (PSRR) to the op-amp’s PSRR, we obtain an extraordinarily high combined value above a theoretical 200dB (wide-band), which is well below any measurable and audible threshold. As a result, the Aeris is essentially free from any intrusion of externa ...
  9. questionMulti-Stage Isolated Power Supplies and Regulation
    The Aeris is powered by two separate low noise, passive power factor corrected, switch mode power supplies (SMPS) – one for analog and one for digital. Both are housed in a single machined external enclosure for maximum mechanical and EMI/RFI isolation. A long life solid-state relay provid ...
  10. questionBenefits of a Single DAC Chip Design
    We made a deliberate decision to base the Aeris design on one single DAC chip, used in stereo mode, rather than one DAC chip per channel. The single chip design is inherently free from any inter-DAC chip delay. A delay of up to 10 nanoseconds (10,000 picoseconds) has been measured when using mul ...
  11. questionDAC-based Volume Control
    One of our primary design goals was to create a simple and short audio signal path. By implementing the Aeris volume control in the DAC chip, we were able to omit several discrete analog components that would have lengthened the signal path, and could have introduced distortion. We selected a DA ...
  12. questionHigh Performance TOSLINK
    IsoSync ECS is designed to operate maximally on all Aeris inputs, including TOSLINK. IsoSync ECS greatly reduces any jitter introduced by the jitter-prone TOSLINK electro-optical circuits, and is so effective that it transforms TOSLINK into a very high performance data input.
  13. questionBNC S/PDIF and Transformer Coupling
    The Aeris supports a coaxial BNC connection due to the fact that the BNC connection guarantees that the input impedance remains stable at a nominal 75 ohms. In addition, both the Aeris BNC S/PDIF digital inputs achieve galvanic isolation of the incoming signal through transformer coupling. Total ...
  14. questionBit-Perfect Preservation
    IsoSync ECS is a highly attractive approach to jitter elimination because it is capable of preserving the source signal in a bit-perfect form while completely restoring the timing information contained in the original recording. Virtually all timing errors introduced and accumulated from all sou ...
  15. questionDual Control Modes for the VCXO
    Seek-lock mode: The Aeris activates a seek-lock mode and matches the incoming sample rate. This process takes approximately one-half second. When the sample rates are matched, the digital loop filter returns automatically to the lock-mode. Lock-mode: In lock-mode, the rate of change on the VCXO ...
  16. questionIsoSync ECS Functional Description
    Data is received by the Aeris using standard adaptive mode USB, or digital interface receivers like SPDIF via 75 ohm BNC and TOSLINK inputs. A certain amount of initial jitter is assumed. The initial focus is to register the audio data in a bit-perfect format, rather than focusing on jitter. Bit ...
  17. questionSources of Jitter
    Jitter arises from clock pulses not having an infinite rise time. Rather, the pulses exhibit a sloped edge. The electronics that receive and detect this edge have a trigger voltage at a defined level. When the signal is polluted by a magnetic field, an electric field, power supply noise, or grou ...
  18. questionMilled Chassis and Functional Isolation
    The relatively high physical mass of the Aeris chassis also provides a high thermal mass, resulting in excellent thermal stability. Once a stabilized temperature is reached, the Aeris chassis resists any further thermal gradients that could induce mechanical stresses resulting in piezo-electric ...
  19. questionOutput Muting
    Relay contacts in parallel with the signal outputs prevent unwanted noises when the Aeris power is cycled on and off. This relay grounds the output temporarily when the device is powered on or off. Because the relay is in parallel with the signal path, no signal passes through the relay when the ...
  20. questionDual Audio Outputs
    The single-ended RCA outputs are buffered and independent from the XLR outputs, which are isolated with the output transformers as mentioned above. This allows the Aeris to drive two amplifiers simultaneously and isolate the ground currents and load demands of each output.
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