cd player „ONE‟
Thank you for buying a Chord Electronics product.
Before you start to enjoy your CD player, please take a couple of minutes to read how to
connect your audio equipment and loudspeakers and how to maximise your listening
As well as your ONE and this user manual, you should also have received the following
1. „CD‟ remote control
2. Mains cable
3. Chord guarantee registration card
4. Remote control manual
This unit complies with 21 CFR 1040.10 and 1040.11
when setting up
To ensure that your CD player works efficiently and safely, please pay particular attention to
the following issues.
Your Chord player should have at least 5cm of clear space all around it to ensure a free flow
of air at all times. We do not recommend that you place ONE directly on a carpet.
mains lead and plug
All Chord equipment comes supplied with the correct mains lead and plug. This should be
used at all times.
if you need to fit a plug for UK/Europe
Connect the blue wire to the neutral terminal
Connect the brown wire to the live terminal
Connect the yellow/green wire to the earth terminal
if you need to fit a plug for US/Canada
Connect the white wire to the neutral terminal
Connect the black wire to the live terminal
Connect the green to the earth terminal
earthing issues in Europe
In some European countries a hum may occur if your ONE is connected to mains sockets that
do not have an earth. If this is the case please ensure that:
1. Your player is connected via a multi-way mains block, which contains an earth point
at each socket outlet. This is to ensure that the chassis metalwork of each item is
connected together.
2. We recommend that an earthing method for your building be implemented.
3. Use the connecting points on your Chord unit and connect to an available earth point.
Safety Warnings
It is important that your player is earthed at all times via its own mains lead. Failure to do this
may be hazardous. The power supply components within the player are designed to operate at
lethal voltages and energy levels. Circuit designs that embody these components conform to
applicable safety requirements. Precautions must be taken to prevent accidental contact with
power-line potentials. Do not connect grounded test equipment.
Caution: This product employs a laser that emits both visible and invisible radiation.
Removal of the top cover or tampering with any of the enclosed electronics may result in
exposure to hazardous levels of laser radiation that could cause eye damage. To prevent
injury this product should be returned for qualified service to Chord Electronics Ltd.
There are no user serviceable parts within the ONE CD player. Unauthorised
tampering or dismantling of this product will invalidate the warranty and could
cause injury.
mains connection
The mains connector of ONE is at the back of the unit. Plug the female end (socket) of the
mains cable into the power connector of the player, and the male end (plug) of the mains
cable into mains wall socket or mains extension socket.
Mains Connector and Switch
powering up
Press the left-hand side of the power switch labelled „I‟. ONE will now power up.
If ONE has no disc loaded, the top panel display with read “NO DISC”; if a disc has been
loaded then the number of tracks and length of the CD will be shown. Please allow a short
time for ONE to read the disc‟s Table of Contents (TOC). During this time the display will
indicate “-- ----“
powering down - long-term
1. Press the STANDBY button on the remote control to put ONE into STANDBY.
2. Press the right-hand side of the power switch labelled „O‟.
powering down - short-term
For everyday use there is no need to power ONE down completely.
Press the STANDBY button on the remote control to put ONE into its Standby mode.
connecting your equipment
Right RCA
Left RCA
Right XLR
Left XLR
ONE - rear panel connections
All the output connections of ONE are situated on the rear panel of the player.
Analogue outputs
ONE has both RCA-phono and balanced XLR analogue outputs, together with BNC digital
S/DIF2 output.
Chord recommend the use of balanced analogue cables over RCA-phono wherever possible,
as this allows improved signal-noise performance and immunity to noise pickup from outside
the system.
Digital outputs
ONE uses a BNC connector with 75ohm impedance for digital audio.
Although less
common than RCA-phono digital connectors, BNC connectors exhibit consistent impedance
behaviour and are essential for the correct transfer of digital audio data.
If your digital-analog converter only has RCA-phono coaxial digital inputs, it is worth having
a cable made by a specialist manufacturer. Please avoid RCA-BNC adaptors as they will
undoubtedly impair the sound quality. In all cases a correctly screened cable should be used.
using ONE with QBD76
ONE digital output
QBD76 dual data inputs
Connect the S/DIF2 output from the ONE to either BNC INPUT on the QBD76.
If you have more than one source with coaxial output please ensure that the other source is
switched OFF when listening to the ONE (and turn ONE off when listening to the other
We strongly advise that you use 75ohm hard-wired BNC-BNC cables and avoid BNC-RCA
adaptors wherever possible, to avoid problems of impedance mismatch and signal reflections.
RAM buffer settings for QBD76
ONE has been designed as the ultimate reference CD source for the world‟s finest digitalanalogue converters, such as our own QBD76.
As such, ONE should be significantly less
reliant on QBD76‟s RAM buffer than many designs; you may still find improved
performance in your system when using the buffer. Please refer to the QBD76 manual for
further details.
everyday use of your ONE
Loading and removing discs
Loading the disc
Firstly open the lid using the handle at the back of the player. Grab the handle firmly
between forefinger and thumb, then push upwards.
ONE – top view
Placing the disc
Place the disc gently but firmly in the CD housing so that the centre of the disc sits right on
the spindle. Now close the lid using the handle. Wait a short time for ONE to read the disc
Table of Contents before you press Play.
Removing discs
Using your forefingers, push the disc towards the back of the player as shown by the arrow
above, so that the disc rises gently over the CD spindle. You should now be able to lift the
disc out with your thumb.
basic operation
ONE – top panel controls
ONE - remote control
ONE – display
For your convenience some CD functions can be accessed from the top panel and all the
functions on the supplied remote control.
To play the disc from the beginning, press “Play” ( ).
To select a particular track, press the track number eg. 6, followed by the “Play” button.
To stop the disc, press “Stop” (
To pause the disc at a particular time, press “Pause” (
). Play can be resumed by pressing
either “Play” or “Pause”.
To select the next or previous track, press Next Track (
) or Previous Track (
To search through the disc in either direction, hold down Search Back (
Forward (
) or Search
To speed up the search, press the “FAST” key once while Search Back or Search Forward are
held down. The FAST key has no effect if pressed on its own.
Press the STANDBY button to put ONE into Standby and to wake it up again.
Normally the player will display the time elapsed on the track you are playing.
Press „TIME‟ once and it will now show total time elapsed on the disc and display TOTAL;
press „TIME‟ again and the player will show the time remaining on the disc and display
once again to
return the
display to normal.
advanced functions
Program Mode - Programming a track selection –
Press the track number (eg. 7) followed by the “OK” button, then the next track (eg. 4)
followed by “OK”, and so on until all tracks have been programmed. To play your selection,
press PLAY.
If you press the “OK” button before entering a track number, an error message “ERR” will
appear on the top panel display.
When in program mode, PROGRAM will be shown on the display. The Previous Track,
Next Track and Search functions will all work as normal, but will move around between the
tracks you have programmed.
The STOP button, if pressed once, returns the player to the beginning of the programmed
selection. If you press STOP a second time then you will exit program mode and your track
selection will be lost.
While the disc is playing, press “REPEAT‟ once to repeat the whole disc. REPEAT will be
shown on the top panel display. Previous Track, Next Track and Search will work as normal
in this mode.
Press „REPEAT‟ again to repeat a particular track; REPEAT1 will now be shown on the
display. If you press Previous or Next track; if you Search past the beginning or end of the
track; or if you press STOP, you will exit repeat mode.
Pressing „REPEAT‟ for a third time will exit repeat mode.
Press „SHUF‟ and the player will play tracks in random order until all tracks have been
played. RANDOM will be shown on the top panel display.
If you want random play to continue indefinitely, press „SHUF‟ and then „REP‟. Play will
now continue until you press STOP.
frequently asked questions
about ONE
How do I use ONE with my DSP8000/R?
For optimal peformance, use ONE and QBD76 in conjunction with your DSP8000/R as
outlined in the DSP8000 manual and pages 7-8 of this manual. When connecting ONE to
DSP8000AV directly, use the stereo balanced XLR input for best performance. For the best
sonic transparency, configure this input to „Bypass‟ instead of „DSP‟.
If the stereo balanced input is already being used by another source such as the Chord
Symphonic phono stage, you could either use the stereo analogue inputs, or the L/R pair of
the 7.1 bypass input.
What gain level should I use with ONE and my Chord preamplifier?
For PRIMA, gain 0.5 is suggested.
For CPA series preamplifiers, gain 1.5 is suggested.
The best settings will depend on the output levels from your other sources. The user
selectable gain is intended to allow the user to „even up‟ the levels from several source
components. Note that CPA 2500 and CPM 2650 do not feature a user-adjustable gain
For full details please refer to the Preamplifiers/Choral Series manuals.
Why does my ONE run warm?
Advanced digital circuitry tends to generate a good deal of heat! Your ONE is made from a
solid billet of Aluminium, which acts like a giant heat sink, and removes the need for fans as
found on many electronic devices. So if the case is warm to the touch, there is no cause for
Product Specification
Frequency Response:
Signal-noise ratio:
Channel Separation:
Total Harmonic Distortion:
DAC Architecture:
Laser Mechanism:
Analogue Outputs:
Digital Outputs:
Finish Options:
Mains Power:
Dimensions (mm):
20Hz – 20kHz +/- 0.2dB
106dB A-weighted
100dB @ 1kHz
< 0.003% 20Hz to 20kHz
24-bit 192kHz Delta-Sigma, 128x
Philips CD-Pro2M
2 x RCA-phono single ended,
2 x XLR balanced
1x BNC digital Coaxial SPDIF
Satin Silver, Satin Black, Brilliant
Gold or Silver Chord badge
50v AC through to 260v AC Auto line
335 x 105 x 170 (W x H x D)
7 Kg
The above specification is subject to change by Chord Electronics Ltd without any prior notice
Chord Electronics Limited
The Pumphouse
Farleigh Bridge
Farleigh Lane
East Farleigh
Kent ME16 9NB
Tel: +44 (0)1622 721444
Fax: +44 (0)1622 721555