Audio Research Reference 6 Manuel utilisateur

Reference 6

H I G H D E F I N I T I O N ®

Thank You.

Thank you for choosing the

Reference 6 to be a part of

your high performance music

listening system. Since 1970,

Audio Research has been creating

some of the world’s nest

audio equipment. Each piece is

handcrafted in Minnesota, and has

been designed to provide many

years of listening enjoyment.

We understand you are eager

to begin listening; however,

please take a few minutes to

read through this guide for

useful information concerning

the operation of your new

preamplier. Once installed,

please allow an appropriate

break-in period to fully appreciate

the benets this preamplier

will provide to your system.

After reading the user guide, if

you have any further questions

regarding your preamplier,

contact your dealer or Audio

Research customer service - they

will be happy to help you make the

most of your new component.

Happy Listening!

Contents

Warnings

Installation

Before Operating the Reference 6

In Your System

A Note about Vacuum Tubes

Connections

Back Panel Connections

Input Connectors

Output Connectors

Record Output

A.C. Power Connection

RS-232, IR Input and 12 V trigger

Operation

Front Panel Controls and Display

Start-Up

Shut-Down

Break-in

Front Panel Controls

Remote Only Functions

Settings Menu

System Settings - Menu Tree

Settings Menu

Auto Shutdown

Processor Mode

Tube Hours

Display Brightness

Volume Reset

Input Naming

Maintenance

Vacuum Tubes

Service

Cleaning

Disposal and Recycling Guidelines

Fuse Values and Locations

Warranty

Specications

Warnings

To prevent re, or shock hazard, do not

expose your Reference 6

to rain or moisture.

Do not place objects containing

water on top of this unit.

This unit contains voltages which can cause

serious injury or death. Do not operate

with covers removed. Refer servicing

to your authorized Audio Research

dealer or other qualied personnel.

The detachable power cord on your

Reference 6 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 6 chassis to provide

absolute protection from electrical shock.

The appliance coupler (a.c. power connector)

at the rear of this unit must be accessible

for emergency power disconnect.

The power button on the front of this

unit, when o, does not disconnect

all power from this unit. This unit

is in sleep mode when not on.

For continued protection against re hazard,

replace the fuse only with the same type

and rating as specied at the fuse holder

(see page 19 for fuse information).

This unit is RoHS compliant.

The Reference 6 has automatic muting to

help protect system components in the

event of low line voltage. When sensing

low line voltage, the preamp displays ‘Low

Line’ and automatically goes into ‘Mute’.

This condition will persist until the line

voltage returns to a safe operating level;

please note the unit will remain in ‘Mute’

even after ‘Low Line’ no longer appears.

Note that automatic muting is only

designed to protect against power line

interruptions or severe voltage drop. It

will not mute in the event of subsonic

transmissions from a faulty input source,

amplier failure or speaker malfunction.

A note about packaging...

Save all packaging in a dry place away from

re hazard. Your Reference 6 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

6 from unnecessary damage or delay.

Before operating the Reference 6

Your Reference 6 preamplier is shipped

with the vacuum tubes packed in a

separate foam-lined carton. These must

be unpacked and installed before you

attempt to operate the preamplier.

Included are six 6H30 tubes for the

analog stage, and a 6H30 and 6550WE

used in the power supply. Proceed

according to the following instructions.

Installation

Remove all screws fastening the top cover.

Carefully remove each vacuum tube

from its protective foam and match its

location ‘V’ number (written on the base

of the tube) to the ‘V’ number printed

next to each socket. Firmly seat each

tube in its matching socket, taking care

to ‘key’ the tube pins to the socket holes.

Retain the tube carton with other packing

materials for possible future use.

Refasten top cover on the preamplier.

V6 V4 V2

V5 V3 V1

Installation

In your system

To ensure normal component life and safe

operation this unit must be operated

only in an upright position. Adequate

airow and proper cooling can occur

only if there is no restriction above and

behind the unit and on either side.

The special non-marring elastomer feet

provide adequate spacing and stability

only on a smooth, hard surface, and also

assist to isolate the preamplier from

spurious vibrations. For upright stability

and best performance, never operate

the unit while it is sitting on a soft

surface such as a thick rug or carpet.

Due to its weight, this preamplier must

be supported on a surface specically

rated for such a load. Check with the

manufacturer of your support system to

be sure it is rated to handle this weight.

If the unit is to be operated in an enclosure

such as an equipment rack, make certain

that adequate airow above and to

each side of the unit is provided. Audio

Research recommends a minimum of

6-8 inches (15-20 cm) of clearance above

the Reference 6 to maintain proper

ambient operating temperature.

The ‘ambient’ operating temperature should

never exceed 120° F or 49° C. Improper

installation will cause premature tube

failure and will aect your warranty,

as well as the service life of the unit.

It is normal for a vacuum tube preamplier

to run quite warm, and if used for

prolonged periods, hot to the touch.

All components within are, however,

operated at safe, conservative levels

and will not be improperly aected

thereby, providing the requirements

outlined above are adhered to.

A Note about Vacuum Tubes

The vacuum tubes in your Reference 6 have

been burned in, tested and electrically

matched to provide the best performance

and reliability of your preamplier. That

said, vacuum tubes must be replaced

from time to time. The 6H30 tubes in

the Reference 6 should have an expected

life of approximately 4,000 hours,

while the 6550WE tube in the power

supply should have a life expectancy of

approximately 2,000 hours. These life

expectancies are only approximate.

Connections

A.C. Mains connector

Fuse Holder

RS-232 connector

Control

connections

Balanced Inputs Single-ended Inputs

Main Outputs

Back Panel Connections

Record Outputs

Connections

Input Connectors

The Reference 6 provides eight pairs of

input connectors; four balanced and four

single-ended, labeled BAL 1-4 and SE 1-4.

Output Connectors

Two pairs of BAL/SE main outputs are

provided. The outputs are connected

in parallel. If using both outputs

simultaneously, the combined input

impedance of the amplier(s) being

driven by the Reference 6 must be

greater than or equal to 20k Ohms.

Record Output

The record output should be connected to

your recorder’s ‘Record’ or ‘Line’ inputs.

These outputs provide a xed-level two-

channel signal (left and right) 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. The signal will then

be routed to the Record Out connectors

when that input source is selected.

Warning

Do not connect the record output directly to

an amplier. This will send full output (with

no volume attenuation) to the amplier(s),

and could cause serious serious damage

tot the amplier(s) or loudspeakers.

A.C. Power Connection

It is important that the Reference 6 be

connected via its supplied 20 amp IEC

14-gauge power cord to a secure, dedicated

A.C. power receptacle. Never connect to

convenience power receptacles on other

equipment. Only use the power switch

on the front of the Reference 6 for On/

O control of the preamplier, or the

IR input, RS232 or remote control.

RS-232 Input

The RS-232 input allows connection of

a control or automation system.

IR Input

The IR input allows a remote IR sensor or

repeater system to be connected to the

Reference 6 for control purposes, utilizing

a standard mono 1/8” connector.

12V Trigger Out

The +12V DC trigger out jack provides

the ability to remotely turn on and

o the preamplier and other linked

components such as power ampliers

having similar capabilities.

Important

Use the best available speaker wires

and interconnects. Audio Research

cannot emphasize this enough. As

better components and systems are

developed, it becomes increasingly

important to avoid the limitations of

inferior system interconnections.

It is important sonically that your entire

system be connected so that the audio

signal arriving at the speakers has correct,

or ‘absolute’ polarity (i.e., non-inverted).

Operation

Front Panel Controls and Display

Input Select

Vacuum Flourescent

Display Volume

Power On/O

Enter

(used with Menu)

Mono/Stereo

Invert Phase

Mute

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