Audio Research REFERENCE PHONO 10 User manual

User Guide

H I G H D E F I N I T I O N ®

REFERENCE

PHONO 10

Phono Preamplifier

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 - 15

Troubleshooting 15

Maintenance

Servicing 16

Cleaning 16

Disposal and Recycling Guidelines 16

Limited Warranty 17

Specications 18

Preface

Thank you for selecting the Reference Phono 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 preamplier of the

highest caliber for music reproduction. The Reference

Phono 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

preamplier. If you have any questions regarding the

operational functions, contact your dealer or distributor

for assistance.

Sit back and enjoy your new preamplier and the

enhancements it will bring to your system. The

Reference Phono 10 will bring new life to your record

collection.

Happy listening!

4Illustrations

POWER MUTE

PLYMOUTH, MINNESOTA

MADE IN U.S.A.

REFERENCE PHONO 10

STEREO PHONO 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

SERIAL

FROM POWER SUPPLY

CABLE "A"

FROM POWER SUPPLY

CABLE "B"

RIGHT

INPUT 1

INPUT 2

LEFT

TURNTABLE

GROUND

SINGLE

ENDED

BALANCED

SINGLE

ENDED

BALANCED

LEFT OUTPUT

RIGHT OUTPUT

RS232

Audio Chassis

Illustrations

Power Supply Chassis

PLYMOUTH, MINNESOTA

MADE IN U.S.A.

REFERENCE PHONO 10

STEREO PHONO 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

6A FUSE

SLO-BLO

T4A (230V)

CAUTION

FOR CONTINUED PROTECTION AGAINST

FIRE HAZARD REPLACE FUSE ONLY

WITH SAME TYPE AND RATING

Remote

HOURS

INPUT 1

INPUT 2

RIAA

DSP DN

POWER

HI GAIN

REFERENCE

PHONO

DSP UP

100

200

500

47K

DECCA

CUSTOM

LO GAIN

MUTE

COLUMBIA

6Warnings

To prevent re, or shock hazard, do not expose your Reference Phono 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, service center or factory.

The detachable power cord on your Reference Phono 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 Phono 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 specied 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

Phono 10 preamplier 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 Phono 10 from unnecessary damage or delay.

Installation

Installation of Vacuum Tubes

Before operating the Reference Phono 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

TOP VIEW

POWER

SUPPLY

UNIT

V10

V11

V12

g. 2

8Installation

In your System

While the Reference Phono 10 does not dissipate an unusual amount of

heat, it is important that it be provided with reasonable airow 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 amplier: not only could this

cause overheating, but hum may be introduced into the preamp from the

proximity of the amplier’s power transformer.

Do not stack components or other objects directly on top of the Reference

Phono 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 qualied personnel).

Ensure a minimum of 8-10” clearance above the unit when placed on

shelving.

Connections

Input Connections

The Reference Phono 10 offers two sets of RCA input connectors, for

connecting multiple turntable/tonearm cables. There is a ground terminal

connection adjacent to the RCA input connectors to allow grounding of the

turntable(s).

Output Connections

There is one set of BAL and one set of RCA output connectors for connecting

to line inputs (Direct, Aux, Phono, Tuner, etc.) of your linestage/preamplier.

All input/output connectors are gold plated and connect ‘ground’ before

‘hot’. On disconnect, ‘hot’ is disconnected rst.

Note: A ‘passive’ line stage is not recommended for use with the Reference

Phono 10 as it may not provide the gain necessary to amplify the output of

the Reference Phono 10 to adequate levels to the power amplier.

It is recommended that all connections be made to the Reference Phono

10 with the power turned ‘off’.

10 Operation

Power-Up Procedure

Secure all rear-panel connections between Reference Phono 10 and the

preamplier. Connect umbilical cables between the Reference Phono 10

Audio and power supply chassis. Twist outer ring to secure.

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 Phono 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 make any other necessary adjustments.

Shut-Down

• Activate ‘Mute’ function.

• Turn off power amplier(s).

• Turn off preamplier.

• Press Reference Phono 10 Power switch to ‘off’.

g. 3 g. 4

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