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The Rega DAC is a 16/20/24-bit at 32kHz to 192kHz digital to analogue converter incorporating an enhanced version of the Rega designed circuit. Developed to be simple to set up and use, the Rega DAC is designed to optimize performance from any two channel PCM digital audio source such as a CD player PC or streaming device.
The input stage comprises a Wolfson digital receiver with a high stability low jitter clock. The receiver and PLL have their own dedicated power supplies. The DAC stage comprises of a pair of parallel-connected Wolfson WM8742 DAC's, which are driven via a buffer stage, which ensures the integrity of the data being fed to the DAC IC's similar to the arrangement used in the Isis (Rega's refrerence CD player).
Great care has been taken to remove noise generated by the PC and other input sources. During development this was identified as a major drawback with many DAC's on the market today.
All the capacitors associated with the analogue signal path are Nichicon FG bypassed with MMK polyester capacitors, and low impedance conductive polymer capacitors are used for DAC decoupling. The power supply utilizes a toroidal transformer, fast rectifier diodes and again Nichicon FG capacitors.
There is a power supply for the control microcontroller, separate from the digital & analogue audio stages. Special attention being paid to the inter IC control signals ensuring the control data noise is kept to a minimum.
KEY FEATURES:
Five different “Digital Inputs” as follows:
USB Isolated (16-bit, 32/44.1/48 kHz)
Input 1 Optical/Toslink (24-bit, 32/44.1/48/88.2/96/176.4/192 kHz)
Input 2 Optical/Toslink (24-bit 32/44.1/48/88.2/96/176.4/192 kHz)
Input 3 Isolated 75 ohm Co-axial (24-bit, 32/44.1/48/88.2/96/176.4/192 kHz)
Input 4 Isolated 75 ohm Co-axial (24-bit, 32/44.1/48/88.2/96/176.4/192 kHz) Use this extra “Coaxial” input to connected to an 192Khz USB Adaptor (not included)
Five user-selectable digital filters (number “4” seems to sound the best, with maybe number“3” for CD by Coaxial, with “5” coming in a close second)
"Rich, Full-bodied, Tube-like," Says Stereophile
The legendary turntable and electronics pros at Rega have turned their expertise to digital-to-analog conversion, and the results are every bit as extraordinary as you might expect. The Rega DAC is a 16/20/24-bit at 32 kHz to 192 kHz DAC incorporating an enhanced version of a Rega-designed circuit. Developed to be simple to set up and use, the Rega DAC is designed to optimize performance from any two-channel PCM digital audio source.
"You'll gravitate toward the Rega DAC for its distinctively Rega sound quality: rich, full-bodied, tube-like," reports Sam Tellig in the May 2011 issue of Stereophile magazine. "I can't think of any better way to upgrade while keeping, say, a Rega CD player as a transport."
- Jeff Dorgay, Tone Audio magazine, December 2010
"On many levels, I found the sound of the Rega DAC more akin to that of its flagship turntable the P9 (which has been a long-term component in my reference system). It shares the P9's quick and open presentation with a healthy dose of pace and timing."
- Hi-fi News magazine, June 2011
"The Rega DAC sounded particularly powerful and dynamic (via coaxial S/PDIF) with a sense of immediacy that commanded attention to the music."
ADDITIONAL FEATURES:
The output amplifier employs a discrete differential multiple feedback filter and output amplifier, with a high cut-off frequency for use with higher sample rates. Rega decided not to use a sample rate converter and process the data at the incoming sample rate in order to keep the signal processing to a minimum. Jitter was minimized by synchronously clocking the digital data with Rega's receiver PLL removing any jitter from the input signal.
PREMIUM COMPONENTS
All the capacitors associated with the analog signal path are Nichicon FG bypassed with MMK polyester capacitors, and low impedance conductive polymer capacitors are used for DAC decoupling. The power supply utilizes a toroidal transformer, fast rectifier diodes, and again, Nichicon FG capacitors.
There is a power supply for the control microcontroller, separate from the digital the analog audio stages. Special attention has been paid to the inter IC control signals in order to ensure that the control data noise is kept to a minimum.
16/20/24-bit at 32 kHz to 192 kHz DAC
Pair of parallel-connected Wolfson WM8742 DACs
Input stage: Wolfson digital receiver with a high-stability low jitter reference clock
Receiver, PLL, and oscillator have their own dedicated power supplies
The output amplifier employs a discrete differential multiple feedback filter and output amplifier
Coaxial and optical digital outputs
RCA analog output
Custom aluminum case
Frequency Response (100K load): Low data rate 44.1/48 kHz Filter 2 = 10 Hz -0.05 dB to 20 kHz -0.1 dB; Medium data rate 88.2/96 kHz Filter 2 = 10 Hz -0.05 dB to 30 kHz -1 dB; High data rate 176/192 kHz Filter 2 = 10 Hz -0.05 dB to 41 kHz -1 dB
Total Harmonic Distortion (24-bit, 96 kHz): 0.006% @ 1kHz
Signal-to-noise ratio: -105 dB (Relative to maximum output level with a 100 Hz to 22 kHz bandwidth)
Maximum output level: 2.175V into 100K load
Bit resolution: 16 to 24 bit (USB is limited to 16 bit)
Supported data rates: 32, 44.1, 48, 88.2, 96, 176, 192 kHz
Power consumption: 7.6W
Dimensions: 8.5" wide, 3.1" high, 10.6" deep
