Audio Research REF 160M Bedienungsanleitung

REF 160M

VACUUM TUBE MONOBLOCK AMPLIFIER

User’s Manual

Customers Come First

Quality Every Day

Advancing Our Legacy

Commitment to Excellence

Thank you for choosing the

Reference 160M to be a part of your

high performance music listening

system. After nearly 50 years, our

focus remains the advancement

of the state-of-the-art in music

reproduction. Every component

is meticulously hand-crafted and

personally auditioned before it

leaves our factory. Our attention to

detail,customerservice,andproduct

supportcreateunprecedentedvalue.

An Audio Research component

is more than a purchase, it’s

an investment.

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 amplier. Once installed,

please allow an appropriate

break-in period to fully appreciate

the benets this amplier will

provide to your system.

After reading the user guide, if you

have further questions regarding

your ampli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!

Thank You.

Safety Instructions

Important Safety Instructions

The lightning ash with arrowhead symbol within an equilateral

triangle, is intended to alert the user to the presence of uninsulated

“Dangerous voltage” within the product’s enclosure that may be of

sucient magnitude to constitute a risk of electric shock to persons.

The exclamation point within an equi-lateral triangle is intended

to alert the user to the presence of important operating and maintenance

(Servicing) instructions in the literature accompanying the product.

1. Read these instructions.

2. Keep these instructions.

3. Heed all warnings.

4. Follow all instructions.

5. Do not use this apparatus near water

6. Clean only with dry cloth.

7. Do not block any ventilation openings. Install in accordance

with the manufacturer’s instructions.

8. Do not install near any heat sources such as radiators, heat registers,

stoves, or other apparatus (including ampliers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding-type plug. A

polarized plug has two blades with one wider than other. A grounding type

plug has two blades and a third grounding prong. The wide blade or the third

prong are provided for your safety. If the provided plug does not t into your

outlet, consult an electrician for replacement of the obsolete outlet.

10.Protect the power cord from being walked on or pinched particularly at plugs,

convenience receptacles and the point where they exit from the apparatus.

11. Only use attachments/accessories specied by the manufacturer

Safety Instructions

12. Use only with the cart, stand, tripod, bracket, or table specied by the

manufacturer or sold with the apparatus. When a cart is used, use caution

when moving the cart/apparatus combination to avoid injury from tip-over

13. Unplug this apparatus during lightning storms or when unused for long periods of time.

14. Refer all servicing to qualied service personnel. Servicing is required when the apparatus

has been damaged in any way, such as power-supply cord or plug is damaged, liquid

has been spilled or objects have fallen into the apparatus, the apparatus has been

exposed to rain or moisture, does not operate normally, or has been dropped.

15.WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO

NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE

16.DO NOT EXPOSE THIS APPARATUS TO DRIPPING OR SPLASHING AND THAT NO

OBJECTS FILLED WITH LIQUIDS, SUCH AS VASES, SHOULD NOT BE PLACED ON

THE APPARATUS and NE PAS EXPOSER CET APPAREIL À DES ÉCLABOUSSURES

OU GOUTTELETTES D’UN LIQUIDE. AUCUN OBJET REMPLIE DE LIQUIDE

COMME PAR EXEMPLE UN VASE NE DOIT ETRE PLACE SUR L’APPAREIL.

17. TO COMPLETELY DISCONNECT THIS APPARATUS FROM THE AC MAINS,

DISCONNECT THE POWER SUPPLY CORD PLUG FROM THE AC RECEPTACLE. POUR

DECONNECTER COMPLETEMENT L’APPAREIL DU RESEAU D’ALIMENTATION,

DECONNECTER LE CORDON D’ALIMENTATION DE LA PRISE MURALE.

18.THE MAINS PLUG OF THE POWER SUPPLY CORD SHALL REMAIN READILY ACCESSIBLE.

LA PRISE DU RESEAU D’ALIMENTATION DOIT DEMEURER AISEMENT ACCESSIBLE.w

Contents

Safety Instructions......................................2

Warnings.......................................................5

A note about packaging................................5

Installation...................................................6

Top view.........................................................6

Before operating the reference 160M ..........6

In your system ...............................................7

A note about vacuum tubes......................... 7

Life Expectancy ............................................. 7

Connections .................................................8

Back Panel Connections................................8

Input Connectors ..........................................8

Output Connectors.......................................8

Matching........................................................9

Loudspeaker Cable Distance ........................9

Remote Turn-on .......................................... 10

RS-232 Control ............................................ 10

A.C. Power Connection............................... 10

Operation .................................................... 11

Front Panel Controls and Displays.............. 11

Start-Up........................................................12

Shut-Down ...................................................12

Front Panel Button Functions .....................13

Back Panel Toggle Switch Functions...........13

Auto Shut O...............................................13

Auto Bias ..................................................... 14

Hour Counter .............................................. 14

Break-in........................................................ 14

Maintenance .............................................. 15

Vacuum Tubes ............................................. 15

Servicing ...................................................... 15

Caution ........................................................ 15

Cleaning....................................................... 15

Disposal and Recycling Guidelines............. 15

Warranty..................................................... 16

Specication ...............................................17

Warnings

To prevent re, or shock hazard, do not expose

your Reference 160M 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.

ThedetachablepowercordonyourReference

160M is equipped with a heavy gauge,

3-conductor cable and a standard three-

prong grounding plug in North America.

For absolute protection, do not defeat the

ground power plug. This provides power line

grounding of the Reference 160M 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.

For continued protection against re hazard,

replace the fuse only with the same type and

rating as specied at the fuse holder.

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.

This unit is RoHS compliant.

A note about packaging...

Save all packaging in a dry place away from

re hazard. Your Reference 160M ampli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 160M

from unnecessary damage or delay.

Important!

The AC Power Supply Cord must be

disconnected from the amplier before

replacement or installation ofvacuum tubes.

See next page (6) Before operating the

Reference 160 M.

Important!

Vacuum tube installation and replacement

should be performed by a qualied technician.

Installation

6H30

Vacuum Tubes

KT150

Vacuum Tubes

KT150

Vacuum Tubes

Top View

triode driver tubes. Proceed according to the

following instructions.

Remove only the screws fastening the top

cover. Do not remove any other screws.

Remove packing foam under top cover

and store with other packing materials.

Before operating the Reference 160M

Your Reference 160M amplier is shipped

with the vacuum tubes packed in foam

blocks. These must be unpacked and

installed before you attempt to operate

the amplier. Included are a matched quad

of KT150 output tubes and (2) 6H30 dual

Installation

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 foam blocks

with other packing materials for possible

future use.

Refasten top cover on amplier. Connect the

fan power plug to its socket at the rear of

the amplier top plate.

In your system

To insure 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 are no

restrictions above and behind the unit and

on either side. Be sure that airow to the 12V

D. C. cooling fan located on the rear panel is

not blocked.

The special non-marring elastomer feet

provide adequate spacing and stability

only on a smooth, hard surface, and also

assist to isolate the ampli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 ampli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, to each side,

and to the rear of the unit is provided.

In any installation, there should be a

minimum of 8 inches of clearance above the

top of the amplier.

The ‘ambient’ operating temperature should

never exceed 86° F (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 power

ampli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

Life Expectancy

The vacuum tubes in your Reference 160M

have been burned in, tested and electrically

matched to provide the best performance

and reliability of your amplier. That said,

vacuum tubes must be replaced from time

to time. The KT150 output tubes in the

Reference 160M should have an expected

life of approximately 3,000 hours, while

the smaller 6H30 tubes should have a life

expectancy of approximately 4,000 hours.

Theselifeexpectanciesareonlyapproximate.

Connections

Input Connectors

The Reference 160M uses a fully balanced circuit topology and has a balanced XLR input

connector and a single-ended RCA input connector on the rear panel. The rear panel switch

must be in the appropriate labeled position for either balanced or single-ended use. Connect

your preamplier’s output to the REF 160M input connector before turning on the amplier.

Do not connect the balanced XLR input connector and single-ended RCA input connector at

the same time –connect one or the other in the same way for both channels.

Output Connectors

Heavy-duty output terminals are provided on the rear panel for 4, 8, or 16-ohm speaker

impedance loads. Using high- quality speaker cables, securely fasten the (-) speaker lead

to the appropriate (black) terminal, then the (+) lead to the matching (red) terminal. 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). Do not over tighten the

output terminal connectors on the amp (use a hex driver and tighten snugly -do not over

tighten). Follow your speaker manufacturer’s impedance specication. The Reference 160M

puts out the same amount of power whether the 4, 8, or 16-ohm terminals are used.

MINNEAPOLIS, MINNESOTA

4 Ω0 Ω8 Ω16 Ω

RS-232 IN OUT

+12V

REMOTE TURN ON

INPUTS

BALANCED

SINGLE

ENDED

5A SLO-BLO

T3.15 (230V)

500 WATTS MAX 50/60Hz~

HOURS

BALANCED

SINGLE

ENDED

LOW

FAN SPEED

HIGH

WARNING

TO PREVENT FIRE AND SHOCK HAZARD

DO NOT EXPOSE THIS DEVICE TO RAIN

OR MOISTURE.

UNIT MUST BE OPERATED IN HORIZONTALPOSITION.

-DO NOT OPERATE WITH COVERS REMOVED-

UNIT CONTAINS VOLTAGES WHICH MAY BE HAZARDOUS

REFERENCE 160M

MONAURAL AMPLIFIER

CAUTION

FOR PROTECTION

AGAINST FIRE HAZARD

REPLACE ONLY WITH

SAME RATING FUSES WARNING

RISK OF HAZARDOUS ENERGY! MAKE PROPER SPEAKER CONNECTION

SEE OWNER MANUAL

DEFEAT

AUTO

SHUT OFF

A.C. Mains connector Speaker Terminals

Reset Button/

Hours Meter

12V

Trigger In/Out

Line Fuse

Balance/Single Ended

Switch

Defeat/Auto Shut O

Switch

Fan Speed

Switch

RS-232

Connector

Inputs

Back Panel Connections

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