The Well-Tempered Computer, an introduction to computer audio

Friday, July 1, 2011

Schitt Audio Bifrost DAC with asynchronous USB

Schitt Audio, maker of the popular Vahalla and Lyre tube headphone amps, is now taking pre-orders for its debut stand-alone DAC to be called the Bifrost, the company's first in a planned series of three.  The DAC has a very respectable set of specs and very likable price of $349.  Featuring a 32-bit D/A conversion, fully discrete analog section, sophisticated clock management system, asynchronous USB 2.0 option, as well as SPDIF coaxial and optical inputs, all with 24/192 capability.  The DAC comes with a 5-year warranty and a 15-day satisfaction guarantee return policy. The Bifrost begins shiipping end of August 2011.



Fully Upgradable
Bifrost's modular design uses separate, snap-in USB Input and DAC/Analog cards. When USB technology changes, you can simply drop in a new, better USB Input Card. When meaningful upgrades to D/A converters come out, you can snap in a new DAC/Analog Card.

AKM4399 D/A Converter and Discrete Analog Section
AKM4399 "Super DAC" 32 bit D/A converter is used and its analog section is a fully discrete, low noise JFET design—the only op-amp in the box is a DC servo.

Advanced Bitperfect Clock Management
Bifrost dispenses with the sample rate converter and uses a sophisticated master clock management system to deliver bit-perfect data to the DAC, preserving all the original music samples--whether it's 16/44.1 or 24/192.

Asynchronous USB 2.0, 24/192, 
Featuring a high-speed USB 2.0 interface and asynchronous data transfer to 24/192, based on the C-Media CM6631 USB receiver. No drivers are required for Macs, and Windows drivers will be downloadable from this site for Windows 7, Vista, and XP.  Please note that this is a $100 option.

Specifications

  • Inputs: Coaxial SPDIF, Optical SPDIF, USB (optional)
  • Input Capability: up to 24/192 for all inputs
  • Input Receiver, SPDIF: Crystal Semiconductor CS8416
  • Input Receiver, USB: C-Media CM6631
  • D/A Conversion IC: AKM4399
  • Analog Summing, Filtering: Fully Discrete, DC Coupled
  • Output: Dual RCA (single-ended)
  • Output Impedance: 75 ohms
  • Frequency Response, Analog Summing Stage: 2Hz-100KHz, -1dB (actual frequency response limited by sample rate)
  • Maximum Output: 2.2VRMS
  • THD: Less than 0.001%, 20Hz-20KHz
  • S/N: Greater than 108dB
  • Power supply: 5 stages of regulation, including separate supplies for critical digital and analog sections.
  • Upgradability: Separate, modular USB Input Card and DAC/Analog Card are snap-in replaceable.
  • Power Consumption: 15W
  • Size: 9 x 6.75 x 2.25”
  • Weight: 5 lbs