5
Technical specification
RS232
The RS232 connector allows your dealer to
upgrade the firmware on your CD31, or control
the CD31 as part of a multi-room system. Do not
connect anything to this socket unless instructed by
your dealer.
IR input
The CD31 is controlled by an infra-red remote
control pointed at the front panel.
The CD31 can also be controlled by using the IR-
input on the back panel.
•
Switch off the CD31 using the main switch at
the back panel.
•
Hold down the ] button at the front and then
switch on again by using the main switch.
The standby indicator lamp will blink three times.
For security reasons this setting disappears every
time the CD31 player is switched off by using the
main switch. To reactivate the IR-input at the back
panel the above described procedure has to be
repeated.
Features
Every component of the CD31, from the CD
transport to the audio output stage, has been
designed to achieve the highest possible audio
performance.
The Primare CD31 Compact Disc Player uses a
precision crystal clock oscillator, and a Burr-Brown
DIR1703 for jitter correction, giving excellent audio
performance.
Precision digital to analogue conversion
Digital to analogue conversion is performed by four
24 bit/96kHz Burr-Brown PCM1704 D/A converters
of the highest selection, K-grade! Interpolation
filtering is carried out by the excellent DF1704. The
circuits are capable of true 24 bit input data and
96kHz sampling rate.
The DACs are configured in a truly balanced
configuration where each DAC uses its own
current to voltage converter stage, finished in a
single ended output stage with an active current
source, instead of the more common use of passive
resistors.
In addition to providing the recommended
balanced XLR audio outputs, the CD31 also
includes unbalanced RCA for analogue audio
output. For digital outputs there is a selection of
three options, RCA 75Ω (SPDIF), optical TOSlink,
and the professional XLR 110Ω (AES/EBU).
No compromise power supply for the
highest possible performance
The Primare CD31 Compact Disc Player uses eight
separate isolated power supplies for the digital,
analogue circuits, and transport mechanism, for
maximum isolation. For the analogue part, discrete
and ultrafast regulation, placed very close to the
analogue stage, is used.
The result is an extremely high signal to noise ratio,
allowing you to take full advantage of the dynamic
range possible with CD.
Analogue output
Unbalanced: 2.0 VRMS
Balanced: 4.0 VRMS
Output Impedance: 100Ω
Digital outputs
Coaxial: (SPDIF) 75Ω
Optical output: TOSlink connector
AES/EBU: 110Ω
PCM Sample Rate: 44.1kHz
General
D/A Converter: 4 x Burr-Brown 1704 K grade
Frequency Response: 20 Hz – 20 kHz (-0.5dB)
Signal to Noise Ratio: 105 dB
Harmonic Distortion: >0.01% (20 Hz – 20 kHz)
Power Consumption Operating: 34 W
Power Consumption Standby: 16 W
Dimensions: 430 x 385 x 100 mm
Weight: 10.5 kg
Color Option Black, Titanium
Additional information
5
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