Research DAC-R Digital to Analogue Converter
Maximise the potential of your digital audio.
The Rega DAC-R is a 16/20/24-bit at 32kHz to 192kHz digital to analogue
converter. Incorporating an enhanced version of the Rega designed circuit,
the DAC-R offers the highest possible resolution over all inputs including
fully asynchronous USB with the addition of remote functionality.
Silver Satin Metal Finish
Black Satin Metal Finish
- 16-20-24-bit at 32kHz to 192kHz digital
to analogue conversion
- Five user selectable digital filters
- Two isolated Co-axial inputs, two
Toslink SPDIF inputs & Isolated USB input
- Input stage comprising of a Wolfson
digital receiver with a high stability low jitter clock
- Jitter minimised by synchronously
clocking the digital data with our receiver PLL
- A pair of parallel-connected Wolfson
WM8742 DAC's, which are driven via a buffer stage, a similar configuration
to that used in the Isis CD player
- Output amplifier with a discrete differential
multiple feedback filter and output amplifier
- Housed in a brand new custom steel
& aluminium case
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. We decided not to
use a sample rate converter and process the data at the incoming sample
rate which keeps the signal processing to a minimum. Jitter was minimised
by synchronously clocking the digital data with our receiver PLL (removing
any jitter from the input signal).
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.
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.