|
Maximise the potential of your digital audio.
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 optimise performance from any two channel PCM digital
audio source such as a CD player PC or streaming device.
With the PC/Laptop and MAC now widely accepted as creditable mediums
for storing and streaming music. The use of high quality lossless
files such as WAV, FLAC and ALAC offer performance through the DAC
equal to and in some cases better than red book CD.
Housed in a custom aluminium and steel case and boasting a pair
of Wolfson DAC IC's, 5 user selectable digital filters, two isolated
Co-axial inputs, two Toslink SPDIF inputs and an isolated USB input.
The Rega DAC is designed and engineered to perform way above its
class.
Technology
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.
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.
|
