Audio Research HIGH DEFINITION PH9 Manuale utente

PH9

Thank You.

Thank you for choosing the PH9

as part of your high performance

music 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 phono

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 phono 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 PH9

In Your System

A Note about Vacuum Tubes

Connections

Back Panel Connections

Input Connectors

Output Connectors

Record Output

A.C. Power Connection

RS-232 and IR Input

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

Cartridge Settings

Tube Hours

Display Brightness

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 PH9 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 PH9 is

equipped with a heavy gauge, 3-conductor

(where applicable) 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 PH9 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. (In sleep

mode, the tubes and audio circuit are

powered o; the microprocessor that

operates the PH9 remains 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 PH9 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 PH9 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 another

occasion requiring shipment occurs, the

original packaging will protect your PH9

from unnecessary damage or delay.

Before operating the PH9

Your PH9 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 phono preamplier. Included

are three 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 on the circuit board.

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 the

top cover on the phono preamplier.

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 phono 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 PH9 to maintain

proper ambient operating temperature.

• The ‘ambient’ operating temperature

should never exceed 86° F and 30° 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 operated at safe,

conservative levels well within tolerances.

A Note about Vacuum Tubes

The vacuum tubes in your PH9 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 PH9 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

IR Input

Phono Input

Main Outputs

Back Panel Connections

Ground Connection

Connections

Input Connectors

The PH9 provides a pair of input connectors.

Connect the output of your tonearm/

turntable to these connectors.

Output Connectors

A pair of single-ended main outputs

are provided. Connect the output

of the PH9 to an input of your

preamplier or integrated amplier.

A.C. Power Connection

It is important that the PH9 be connected

via its supplied 15 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 PH9 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 PH9 for control purposes, utilizing

a standard mono 1/8” connector.

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

Vacuum Fluorescent

Display

Power On/O

Option

(used with Menu) Mono

Mute

Enter

(used with Menu)

Indice

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