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.
Developed to be simple to set up and use, the Rega DAC-R is
designed to optimize performance from any two channel PCM digital audio source.
With the PC now widely accepted as a credible medium for storing and streaming music,
the use of high quality lossless files such as WAV, FLAC and ALAC offer
performance through the DAC-R equal to, and in some cases better
than, Red Book CD. 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).
The DAC-R is housed in a custom aluminum and
steel case and boasts a pair of Wolfson DAC IC’s, three user selectable digital
filters and one isolated asynchronous USB, two isolated Co-axial inputs &
two Toslink SPDIF inputs.
The DAC-R has been designed and engineered to
integrate perfectly into any system and achieve the highest performance in its
class. We hope you enjoy this Rega product for many years to come.
The optical and coaxial input stage comprises
a Wolfson digital receiver with a high stability, low jitter clock
driving the receiver PLL. The receiver and PLL have their own dedicated power
The DAC stage comprises a pair of
parallel-connected Wolfson WM8742 DAC’s, that 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 reference CDP.
The USB input stage is comprised of a bit
perfect XMOS USB Audio 2.0 with asynchronous clocking. The USB input
stage feeds the Optical and Coaxial input stage via an isolating transformer
giving total isolation from the host computer.
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 minimized by synchronously
clocking the digital data with our receiver PLL (removing any jitter from the
All the capacitors associated with
the analogue signal path are audio grade bypassed with MMK polyester
capacitors, and low impedance conductive polymer capacitors are used for
The power supply utilizes
a toroidal transformer, fast rectifier diodes and again audio grade capacitors.
There is a power supply for the control micro controller, separate from the
digital & analogue audio stages. Special attention being paid to
the inter IC control signals ensures the control data noise is kept to a minimum.