Audio Research REFERENCE PHONO 10 User manual
User Guide
H I G H D E F I N I T I O N ®
REFERENCE 10
Stereo Preamplifier
Ref 10.indd 1 4/17/13 1:21 PM
2Contents
Preface 3
Illustrations
Audio Chassis 4
Power Supply Chassis 5
Warnings 6
Installation
Installation of Vacuum Tubes 7
In Your System 8
Connections 9
Operation
Power-Up Procedure 10
Front Panel Controls 11
Remote Control Only Controls 12
Interactive Touch Screen Operation 13 - 16
Troubleshooting 16
Maintenance
Servicing 17
Cleaning 17
Disposal and Recycling Guidelines 17
Limited Warranty 18
Specications 19
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3
Thank you for selecting the Reference 10 as part of your
music listening system. The engineers and designers at
Audio Research have spent countless hours of listening
and testing to create a preamplier of the highest caliber
for music reproduction. The Reference 10 has been
designed to provide you many years of playback.
Please take a few minutes to read through this guide
to help you better understand and optimize your new
preamplier. If you have any questions regarding the
operational functions, contact your dealer or distributor
for assistance.
Sit back and enjoy your new preamplier and the
enhancements it will bring to your system. The
Reference 10 will bring new life to your entire music
collection.
Happy listening!
Preface
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4
Audio Chassis
RIGHT INPUTS
LEFT INPUTS
1
1
2
2
3
3
4
4
5
5
6
6
PROC
PROC
RECORD OUT
RECORD OUT
MAIN OUTPUTS
MAIN OUTPUTS
FROM POWER SUPPLY
CABLE "A"
FROM POWER SUPPLY
CABLE "B"
PLYMOUTH, MINNESOTA
MADE IN U.S.A.
REFERENCE 10
STEREO PREAMPLIFIER
RIGHT OUTPUTS
LEFT OUTPUTS
SERIAL
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
!
RS232
TO PREVENT FIRE AND SHOCK HAZARD, DO NOT
EXPOSE THIS DEVICE TO RAIN OR MOISTURE.
UNIT MUST BE OPERATED IN A HORIZONTAL POSITION.
-DO NOT OPERATE WITH COVERS REMOVED-
UNIT CONTAINS VOLTAGES
WHICH MAY BE HAZARDOUS
Illustrations
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5
PLYMOUTH, MINNESOTA
MADE IN U.S.A.
REFERENCE 10
STEREO PREAMPLIFIER
WARNING
TO PREVENT FIRE AND SHOCK HAZARD, DO NOT
EXPOSE THIS DEVICE TO RAIN OR MOISTURE.
UNIT MUST BE OPERATED IN A HORIZONTAL POSITION.
-DO NOT OPERATE WITH COVERS REMOVED-
UNIT CONTAINS VOLTAGES WHICH MAY BE HAZARDOUS.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION
!
VOLTS
SERIAL
TO AUDIO CHASSIS
CABLE "A"
TO AUDIO CHASSIS
CABLE "B"
235W MAX 50/60 HZ
~
REMOTE TRIGGER
+12V
6A FUSE
SLO-BLO
T4A (230V)
CAUTION
FOR CONTINUED PROTECTION AGAINST
FIRE HAZARD REPLACE FUSE ONLY
WITH SAME TYPE AND RATING
Power Supply Chassis
Illustrations
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6Warnings
To prevent re, or shock hazard, do not expose your Reference 10 to rain
or moisture.
This unit contains voltages which can cause serious injury or death. Do
not operate with cover removed. Refer servicing to your authorized Audio
Research dealer or other qualied personnel.
The detachable power cord on your Reference 10 is equipped with a heavy
gauge, 3-conductor cable and a standard three-prong grounding plug. For
absolute protection, do not defeat the ground power plug. This provides
power line grounding of the Reference 10 chassis to provide absolute
protection from electrical shock.
For continued protection against re hazard, replace the fuse only with the
same type and rating as specied at the fuse holder.
The appliance coupler at the rear of this unit must be accessible for
emergency power disconnect.
A note about packaging...
Save all packaging in a dry place away from re hazard. Your Reference
10 preamplier is a precision electronic instrument and should be properly
cartoned any time shipment is made. You may not have occasion to return
your unit to the factory for service, but if that should prove necessary, or
other occasion requiring shipment occurs, the original packaging will protect
your Reference 10 from unnecessary damage or delay.
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7
Installation
Installation of Vacuum Tubes
Before operating the Reference 10...
This unit has been shipped with the vacuum tubes installed in protective
foam in a separate box packed inside the shipping carton. Remove the
tubes carefully from the protective foam. Using a phillips-head screwdriver
to loosen the fastening screws, remove the top cover and set aside.
After removing the top cover and the vacuum tubes packed in protective
foam, see the accompanying illustrated sheet (g. 1 + 2) for instructions
on installing the tubes for your Reference 10 in their proper locations in the
power supply and audio chassis. Note that the numbers written on each
tube correspond to a ‘V’ number printed on the circuit board next to each
tube socket. Insert each tube rmly, carefully aligning the tube pins with the
corresponding socket holes.
V1V5
V7 V3
V2V6
V8 V4
TOP VIEW
AUDIO UNIT
g. 1
V9
TOP VIEW
POWER SUPPLY
UNIT V10
V11
V12
g. 2
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8Installation
In your System
While the Reference 10 does not dissipate an unusual amount of heat,
it is important that it be provided with reasonable airow to assure long,
trouble-free operation. In addition, the following installation guidelines will
help insure maximum sonic performance as well as reliable service:
Operate unit in upright and horizontal position, prefer-ably on solid, non-
metal shelving.
Do not stack the preamp on top of a power amplier: not only could this
cause overheating, but hum may be introduced into the preamp from the
proximity of the amplier’s power transformer.
Do not stack components or other objects directly on top of the Reference
10.
Do not place or operate your preamp on a soft or irregular surface such as
a rug. This will prevent proper ventilation.
Do not operate your preamp without the top and bottom covers installed.
These are required both for safety as well as shielding from interference
(except in service operations by qualied personnel).
Ensure a minimum of 8-10” clearance above the unit when placed on
shelving.
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9
Connections
Analog Connections
Input Connectors: The Reference 10 provides seven pairs of BAL/SE
input connectors: 1, 2, 3, 4, 5, 6, and Processor. The BALANCED/SINGLE
ENDED selector (touch screen) or BAL/SE (remote) should be selected to
match the type of connection used (BAL or SE) on each input.
Connect either the BAL or SE connectors for each input. Never connect
the BAL and SE connectors simultaneously for each input.
Output Connectors: Two pairs of BAL/SE main outputs are provided.
Record Output: The BAL/SE tape outputs should be connected to your
recorder’s ‘Record’ or ‘Line’ inputs. These outputs provide a xed-level
two-channel signal (L, R) to your recorder from whichever input is selected.
The non-variable output level will be the same as the output of the selected
source.
It is possible to dub or copy from one recorder to another by connecting the
output of the source recorder to an unused set of stereo inputs (e.g. 5 or
6). The signal will then be routed to the Record Out connectors when that
input source is selected.
RS-232 Connection: The RS-232 connection allows for remote control via
systems such as Creston or other automation systems.
12V In/Out Start Jacks: The +12V DC input/output jacks provide the
ability to remotely turn on and off other linked components such as power
ampliers having similar capabilities.
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10 Operation
Power-Up Procedure
Secure all rear-panel connections between Reference 10, power amplier(s)
and input sources.
Plug three-prong power cord from rear of chassis into grounded A.C. wall
outlet. The Power switch defaults to ’off’ when the unit is plugged into a
power receptacle.
Press power switch (either remote or front panel). The screen will initially
display ‘Now Loading’ for a few seconds, after which it will display the Audio
Research logo followed by ‘Reference 10’ (g. 3 + 4). The main display
screen will then appear on the screen, and ‘MUTE’ will be ashing. Once
‘MUTE’ becomes solid, depress the front panel MUTE button (right button)
or touch the word ‘MUTE’ on the screen to initiate normal operation.
Select input source, then BAL or SE as necessary.
Shut-Down
Activate ‘Mute’ function.
Set Volume level to 0.
Turn off power amplier(s).
Press Power switch to ‘off’.
Turn off input sources.
g. 3 g. 4
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