Bogen Wma-80 Owner's manual

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1

Table of contents

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BOGEN

COMMUNICATIONS,

INC.

WALL

MOUNT

MODULAR

AMPLIFIERS

WMA-80

&

WMA-160

INSTALLATION

AND

OPERATION

INSTRUCTIONS

The

Bogen

WMA-80*

and

WMA-160

are

professional

quality

wall-mounting

amplifiers

suited

for

use

in

gymnasiums,

auditori¬

ums,

and

banquet

rooms

where

inconspicuous,

permanent

mount¬

ing

is

desired.

Both

models

combine

modular

flexibility

with

power

MOSFET

performance

and

are

available

in

flush-mount

or

sur¬

face-mount

configurations.

A

locking

panel

on

the

front

cover

secures

the

unit

when

not

in

use,

and

is

designed

so

that

it

cannot

be

removed

without

access

to

the

area

behind

the

panel.

The

WMA-80

and

WMA-160

arc

ralcd

at

80

ami

160

walls,

respectively.

Each

has

8

input

channels:

a

built-in

Lo-Z

mic¬

rophone

input

(with

a

3-pin

female

connector);

a

Hi-Z

Projector

input

(with

1/4"

connector);

and

six

module

ports.

The

ports

accept

any

combination

of

the

Bogen

D-Series

plug-in

modules

to

define

the

function

of

each

channel.

Inputs

are

mixed

on

an

active

buss,

allowing

interaction

for

three

levels

of

priority

Modules

set

to

priority

level

1

are

muted

by

modules

set

to

priority

levels

2

or

3.

Modules

set

to

priority

level

2

mute

modules

set

to

level

1

and

are

muted

by

modules

set

to

priority

level

3.

To

obtain

the

best

control

over

room

acoustics,

the

WMA

Series

features

a

10-band

graphic

equalizer,

which

provides

±8dB

at

ISO

centers

of

125,200,315,

500,800,1.2k,

2k,

3.1k,

5k,

and

8k

Hz.

Equalizer

slide

controls

are

located

behind

the

front

cover

to

prevent

tampering

after

installation

and

setup.

A

low-cut

filter

(-3dB

@

65Hz)

and

tone

control

bypass

switch

are

also

provided

and

are

located

in

the

module

port

cage.

Individual

level

controls

are

provided

for

each

channel.

A

Master

Volume

Control

sets

the

final

output

level.

A

bar-graph-

type

LED

output

meter

provides

output

level

indication.

Power

MOSFET

output

stages

and

protective

circuitry

provide

performance

and

reliability

and

eliminate

the

need

for

output

fuses

and

thermal

fuse

links.

A

built-in

compressor

circuit

protects

speakers/drivers

from

damage

by

limiting

the

output

of

the

pream¬

plifier

to

1

volt.

Each

amplifier

has

a

direct

4-ohm

output

for

use

in

professional

applications

plus

transformer-coupled

8-ohm

and

25V

and

70V

outputs.

The

amplifiers

operate

from

a

120

volt,

60Hz

AC

source.

A

push-to-rescl

circuit

breaker

is

included.

UNPACKING

The

amplifier

was

carefully

checked

before

leaving

the

factory.

Inspect

the

shipping

container

and

components

for

evidence

of

improper

handling.

If

the

unit

has

been

damaged,

place

an

imme¬

diate

claim

with

the

dealer/distributor

from

whom

the

unit

was

purchased.

If

the

unit

was

shipped

directly

to

you,

notify

the

transportation

carrier

without

delay

and

file

a

claim.

INSTALLATION

CAUTION

These

installation

instructions

are

for

use

by

qualified

personnel

only.

To

avoid

an

elertrio

shook,

do

not

perform

any

installation

or

service

procedures

other

than

that

con¬

tained

in

the

Operating

Instructions

unless

you

are

qualified

to

do

so.

Refer

all

servicing

to

qualified

service

pzmmneL

BACK

BOX

INSTALLATION

A

surface-mount

or

flush-mount

cabinet

is

required

for

instal¬

lation.

Follow

the

instructions

on

page

2

of

this

manual

to

install

the

surface

mount

(BB-S)

or

flush-mount

(BB-F)

enclosure.

OUTPUT

CONNECTIONS,

LOW-CUT,

EQ

DEFEAT

The

amplifiers

provide

a

direct

output

at

4-ohms

and

trans¬

former-coupled

8-ohm,

25V

and

70V

taps

for

use

with

distributed

systems.

The

WMA-80

includes

a

25V

center-tapped

output.

When

using

transformer-coupled

taps,

be

sure

that

the

link

on

the

output

terminal

strip

connects

the

OUTPUT

TRANSFORMER

IN

terminal

to

the

DIRECT

+

terminal.

Remove

the

link

when

using

the

direct

output

A

Low-Cut

filter

switch,

located

in

the

port

cage,

reduces

low-frequencies

when

using

transformer-coupled

outputs.

Set

the

switch

to

IN

when

using

transformer-coupled

outputs,

and

OUT

when

using

the

direct

output.

The

Tone

Control

defeat

switch,

located

in

the

port

cage,

bypasses

the

amplifier’s

equalizer

filter

controls

for

a

flat

response.

Set

the

switch

to

IN

to

enable

the

equalization

filters

and

OUT

to

bypass

the

filters.

MODULE

INSTALLATION

Before

installing

each

module,

follow

the

instructions

on

page

3

of

this

manual

to

configure

it

for

the

desired

function

or

priority

level.

Set

the

HIGH-/LOW-CUT

filter

controls

and

GAIN

con¬

trols

on

modules

so

equipped

to

mid-rotation.

To

prevent

damage

to

the

modules

or

the

amplifier,

be

sure

that

the

amplifier

POWER

switch

Is

in

the

OFF

position

before

installing

or

removing

modules.

To

install

modules,

align

the

top

and

bottom

edges

of

the

module

printed

circuit

board

in

the

slots

of

the

port,

and

slide

into

the

port

to

engage

the

edge

connectors.

Secure

the

module

with

two

screws.

ModiHes

set

to

priority

level

1

receive

(and

are

muted

by)

priority

signals

from

any

module

set

to

priority

level2

or

3.

Modules

set

to

priority

level

2

send

priority

signals

to

mute

any

modules

set

to

priority

level

1,

and

receive

priority

signals

from

any

module

set

to

priority

level

3.

Modules

set

to

priority

level

3

send

priority

signals

to

mute

modules

set

to

priority

level

1

or

2.

•WMA-80

is

UL

listed.

Printed

In

Korsa

9008

94-5887-03

BACK

BOX

INSTALLATION

1

*

1

)

BB-8

INSTALLATION

1.

INSTALL

Bfl-S

BACK

BOX

ON

WALL

MAKING

SURE

THAT

THE

BOX

IS

SQUARELY

MOUNTED.

ALLOW

FREE

ACCESS

ABOVE

BOX

FOR

AC

WIRING

AND

ABOVE

OR

BELOW

BOX

FOR

AUDIO

WIRING.

2.

HAVE

POWER

WIRING

RUN

NEAR

UPPER

RIGHT

HAND

COB

HER

WMCRE

BOX

WILL

BE

MOUNTED.

S

SECURE

BOX

ON

WALL

WITH

SCREWS

THROUGH

BACK

HOLE8

(4

SCREWS).

<A2)

BB-F

INSTALLATION

1.

PREPARE

MOUNTING

HOLE

FOR

BB-F

BACK

BOX.

HOLE

8IZE

SHOULD

BE

24-13/1671

X

MINIMUM

OPENING

WITH

STUDS

OR

MOUNTING

SURFACES

ON

EACH

SIDE.

2.

HAVE

POWER

WIRING

RUN

NEAR

UPPER

RIGHT

HAND

CORNER

WHERE

BOX

WILL

BE

MOUNTED.

3.

INSTALL

BB-F

BACK

BOX

IN

WALL

MAKING

SURE

THAT

THE

BOX

IS

SQUARELY

MOUNTED

AND

THE

FRONT

SURFACE

FLUSH

WITH

THE

FMUSHED

WALL.

USE

SHIMS

IF

NECESSARY.

ALLOW

FREE

ACCESS

ABOVE

BOX

FOR

AC

WIRING

AND

ABOVE

OR

BELOW

BOX

FOR

AUDIO

WIRING.

4.

SECURF

RAX

IN

WALL

WITH

SCREWS

THROUGH

SIDE

SLOTS

(4

SCREWS).

5-WITH

BOX

POSITIONED,

INSTALL

4

ADDITIONAL

SCREWS

IN

HOLES

NEXT

TO

04-OT3.

BB-F

<B)

JUNCTION

BOX

WIRING

1.

SUPPLY

AC

POWER

TO

UNIT

THROUGH

CONDUIT,

BX

OR

ROMEX

M

ACCORDANCE

WITH

LOCAL

ELECTRICAL

COOES

9

SNAP

AC

RECEPTACLE

INTO

JUNCTION

BOX

(GNO

PIN

DOWN)

AND

CONNECT

WIRES

AS

SHOWN

USING

WIRE

NUT8.

S

8B-F;

IN8TALL

JUNCTION

BOX

IN

BB-F

AND

SECURE

WITH

4

#«X3/8

SCREWS.

BBS:

INSTALL

JUNCTION

BOX

IN

88-S

AND

accuse

with

*

x

a/e

screws

ano

KEP8NUTS.

<C)

PREPARATIONS

BEFORE

IN8TAUJNO

AM

PURER

1.

RUN

ALL

AUDIO

LEADS

INTO

WALL

BOX.

THE

PREFERRED

ARRANGEMENT

IS

FOR

OUT¬

PUT

LEADS

TO

ENTER

THROUGH

THE

TOP

AND

INPUT

LEADS

TO

ENTER

THROUGH

THE

BOTTOM.

USE

KNOCKOUTS

AS

NECES¬

SARY.

MAKE

SURE

WIRES

DO

NOT

REST

AGAINST

SHARP

EDGES

OF

BOX

2.

INSTALL

HINGES

(PACKED

WITH

AMPLIFIER)

USING

6

#8

x

3/8

SCREWS.

DO

NOT

INSTALL

Uirw

F

RTRFWQ

OF

I

OWED

UIUOF

(USED

FOR

GROUND

STRAP

CONNECTION

-

SEE

*D2*).

a

CHECK

TO

SEE

THAT

AC

POWER

IS

AVAIL¬

ABLE

AT

THE

OUTLET.

FRONT

PANEL

MOUNTING

1.

MOUNT

FRONT

PANEL

(BUT

DO

NOT

TIGHTEN)

WITH

4

#8-32

X

3/8

SCREWS

AT

TOP

AND

BOTTOM

OF

PANEL

2.

INSTALL

2

#8

X

3/8

SCREWS

ON

INSIDE

UP8

OF

DOOR

OPENING,

THEN

TIGHTEN

ALL

MOUNTING

SCREWS.

DO

NOT

OVEn-

TIGHTEN

AS

U-CLIP

WILL

STRIP.

3.

CHECK

TO

SEE

THAT

DOOR

OPENS

AND

CLOSE8

CORRECTLY.

<D>

AMPUFIER

INSTALLATION

1.

MOUNT

AMPLIFIER

ON

BACK

BOX

BY

ALIGN¬

ING

HINGE

PINS

AND

LOWERING

INTO

PLACE.

2.

CONNECT

GROUND

STRAP

8Y

INSERTING

MIDDLE

HINGE

SCREWS

THROUGH

LUGS

OF

GROUND

STRAP

A8

SHOWN

IN

ILLUSTRA¬

TION.

a

ROUND

STRAP

MUST

BE

(NETAUXO

TO

MEET

UL

REQUIREMENTS.

a

MAKE

NECESSARY

INPUT

AND

OUTPUT

CON¬

NECTIONS

(CARE

SHOULO

BE

TAKEN

TO

KEEP

INPUT

AND

OUTPUT

LEADS

SEPARATED

AS

MUCH

AS

POSSIBLE).

A.WITMPuWEKSWIien

IUHNEDOFF,

PLUS

AC

CORD

INTO

SIDE

OUTLET

ON

JUNCTION

BOX

5.

TURN

AMPUFIER

ON

AND

CHECK

CONNEC¬

TIONS.

6.

SECURE

AMPUFIER

ILBING

a

4AJW

.

1/9

SCREWS.

2

MODULE

SETUP

(FOR

QUALIFIED

SERVICE

PERSONNEL

ONLY)

Sound

Reinforcement

-

Modules

MM-F

&

MM-S

Low-impedance,

transformer-balanced

microphone

preampli¬

fier

module

with

HIGH-/LOW-CUT

filters,

GAIN

control

(25dB

range),

phantom

power.

MM-F

has

3-pin

female

connector;

MM-S

has

screw

terminals

(Terminal

#1

Is

GND,

#2

is

LO,

and

#3

is

HI

on

all

modules).

Phantom

Power:

Move

PHANTOM

P.S.

jumper

to

the

ON

position

for

l

22V

phantom

supply.

Select

OFF

position

to

bypass.

Microphone

Pacing

-

Module

MP-S

Signal-activatea

low-impedance,

transformer-balanced

micro¬

phone

preamplifier

module

with

HIGH-/LOW-CUT

filters,

GAIN

control

(25dB

range).

Automatic

Level

Control

((kLC),

three

levels

of

priority

and

phantom

power

are

jumper

selected.

Screw

terminal

connectors.

Phantom

Power:

Move

PH.

P.S.

jumper

to

ON

position

for

+22V

phantom

supply.

Place

jumper

on

either

header

pin

to

bypass.

ALC.

Move

ALC

jumper

lu

ON

pusltiun;

muve

lu

OFF

tu

bypass.

Muting

Priority

(using

PRIORITY

ASSIGN

jumpers):

Level

1

—

Place

one

jumper

in

the

"1"

position

and

store

the

unused

jumper

on

an

empty

pin.

Level

2

—

Place

both

jumpers

in

the

"2"

position.

Level

3

—

Place

one

jumper

in

the

"3"

position

and

store

the

unused

jumper

on

an

empty

pin.

Telephone

Paging

—

Module

TP-S

Signal-activated

telephone

paging

module

provides

a

600-ohm

balanced

input

with

-24dBm

sensitivity

for

matching

to

telephone

page

lines.

Includes

IIIGH-/LOW-CUT

filters

and

GAIN

control

(25dB

range).

Automatic

Level

Control

(ALC)

and

three

levels

of

priority

are

jumper-selected.

Screw

terminal

connectors.

ALC:

Move

the

ALC

jumper

to

ON

position

to

enable

ALC;

move

to

OFF

position

to

bypass.

Muting

Priority

(using

PRIORITYASSIGN

jumpers):

Level

1

—

Place

one

jumper

in

the

"1"

position

and

store

the

unused

jumper

on

an

empty

pin.

Level

2

—

Place

both

jumpers

in

the

"2"

position.

Level

3

—

Place

one

jumper

in

the

"3"

position

and

store

the

unused

jumper

on

an

empty

pin.

Auxiliary

Input

—

Module

BL-5

Transformer-balanced

auxiliary

input

module

suitable

for

line¬

bridging

or

line-matching.

Use

the

printed

circuit

board

jumper

to

select

either

600-ohm

input

or

10-kitohm

input.

Screw

terminal

connectors.

Line

Output

-

Module

LO-S

Module

provides

jumper-selected

600-ohm

transformer-bal¬

anced

(

+

4dBm)

output

or

0.5-watt

direct

output

at

8

ohms.

May

be

used

for

line

output

from

the

D-Series

mixing

buss

or

for

music-on-hold

applications.

Parallel

RCA

jades

permit

one

music

source

to

be

used

for

M.O.H.

and

background

music.

A

jumper-

selected

pad

provides

20dB

attenuation

of

the

signal

from

the

music

source.

LEVEL

control

sets

the

module

output

level.

Output

Selection:

Select

DIRECT

or

XFMR-coupled

output

by

placing

jumper

J4

in

the

appropriate

position.

(When

using

the

direct

output,

connect

the

8-ohm

load

between

screw

ter¬

minals

#1

and

#3.

When

using

transformer

output,

terminal

#1

is

GND,

#2

is

LO,

and

#3

Is

HI.)

Place

jumper

J2

in

L.O.

position

for

line

output

or

in

M.O.H.

position

for

music-on-hold

applications.

Connect

the

music

source

to

the

MUSIC

IN

(RCA)

jack;

the

MUSIC

OUT

jack

is

paralleled

to

allow

same

signal

source

to

be

used

for

back¬

ground

music.

Attenuator

Pad:

Place

jumper

J3

in

the

20dB

position

to

at¬

tenuate

the

signal

connected

to

the

MUSIC

IN

jack.

Bypass

the

pad

by

plating

the

jumper

in

the

OdB

position.

Tone

Signal

Generation

—

Module

TG-S

The

module

generates

four

distinct

tones:

CHIME,

STEADY,

ALARM,

and

BURST.

May

be

assigned

to

any

of

three

levels

of

priority.

Requires

customer-supplied

contact

closure

between

the

desired

Tone

and

ENABLE

screw

terminal

connectors.

Muting

Priority

(using

PRIORITY

ASSIGN

jumpers):

Level

1

—

Place

one

jumper

in

the

"1"

position

and

store

the

unused

jumper

on

an

empty

pin.

Level

2

—

Place

both

jumpers

in

the

"2"

position.

Level

3

—

Place

one

jumper

in

the

"3"

position

and

store

the

unused

jumper

on

an

empty

pin.

Remote

Control/Compression

-

Module

vc-c

Dual-function

(jumper-selected)

compressor/remote

volume

control

module.

The

compressor

limits

the

power

amplifier

input

signal

to

1

volt

to

prevent

overdrive.

The

DC-operated

full

range

volume

control

allows

any

output

setting

up

to

the

maximum

preset

level

of

the

MASTER

control

on

the

D-Series

unit.

Compression:

Set

the

PRE/AMP

LINK

switch

on

the

D-Series

unit

to

OUT

position.

Connect

the

PREAMP

OUT

jack

on

the

D-Series

unit

to

the

VC-C

IN

connector.

Connect

the

VC-C

OUT

jade

to

the

AMP

IN

connector

on

the

D-Series

unit.

Place

jumper

J1

in

the

IN

position

to

enable

the

compression

func¬

tion;

move

to

the

OUT

position

to

bypass.

Remote

Volume

Control:

Connect

accessory

RVC-D

to

ter¬

minals

#2

and

#3.

FM

Reception

-

Module

FM-T

FM

tuner

module

designed

as

a

preset

background

music

source.

Screwdriver-adjusted

tuning.

The

output

is

jumper-se¬

lected

to

the

mixing

bus

of

the

D-Series

unit

or

to

the

module’s

RCA-type

connector.

May

be

configured

to

accept

priority

signals

from

other

modules.

Monaural

operation.

Screw

terminals

for

antenna.

Output:

Place

jumper

J1

in

OUT

position

to

assign

tuner

output

to

the

module's

RCA

connector.

Place

jumper

J1

in

MIX

DUS

position

to

assign

module’s

output

to

the

D-Series

mixing

buss.

Mute:

Place

jumper

J2

in

the

ON

position

to

mute

FM-T

with

any

level

2

or

3

priority

signal.

Place

in

OFF

position

to

prevent

muting

from

priority

signals.

MIC/Line

Remote

Control

-

Module

MR-S

Low-impedance

transformer-coupled

MIC

preamp,

or

line-

level

module

with

HIGH-/IjOW-CUT

filters,

GAIN

control

(25dB

range),

phantom

power.

Full-range

DC-operated

full-range

RVC

allows

any

output

setting

up

to

maximum

preset

on

amplifier

channel

control.

Screw

terminal

connectors.

Input:

Set

Jumper

J2

to

MIC

position

for

microphone

input.

Set

to

LINE

position

for

line

level

input.

Phantom

Power

Move

jumper

J1

to

ON

position

for

+22V

phantom

supply.

Select

OFF

position

to

bypass.

Mute:

Place

jumper

J3

in

the

ON

position

to

mute

MR-S

with

any

level

2

or

3

priority

signal.

Place

in

OFF

position

to

prevent

muting

from

priority

signals.

RVC:

Connect

accessory

RVC-D

to

terminals

#1

and

#4.

3

PHYSICAL

FEATURES

FRONT

CHASSIS

CONTROLS

AND

INDICATORS

(Refer

to

Figure

1)

POWER

LED

LEVEL

INDICATORS

Bar-type

LED

meter

provides

a

graphic

display

of

the

output

level.

Illuminates

red

when

levels

above

OdB

are

reached,

to

indicate

possible

signal

clipping

CHANNEL

1

-

G

Individual

lovol

controls

for

modulo

input

channels

1

through

6

MASTER

Master

control

sets

overall

output

level

MIC

Level

control

for

fixed

microphone

input

channel

PROJECTOR

Level

control

for

the

fixed

projector

input

MIC

IN

Professional

3-pln

female

connector

provides

a

Lo-Z

balanced

microphone

input

PROJECTOR

IN

1

/4"

connector

provides

a

Hi-Z

projector

input.for

audio-visual

applications

EQ

FILTER

10

linear-action

filter

controls

provide

±8dB

at

ISO

centers

of

125,200,315,500,800,1.2k,

2k,

3.1k.

5k.

and

8k

Hz

AC

BREAKER

Press-to-Reset

AC

circuit

breaker

protects

against

excessive

current

flow

REAR

CHASSIS

CONTROLS

AND

CONNECTORS

(Refer

to

Figure

2)

OUTPUT

TERMINAL

STRIP

Screw-terminal

strip

for

connection

to

direct

and

transformer-coupled

outputs.

Remove

the

link

between

the

DIRECT

+

terminal

and

OT

IN

terminal

when

using

direct

output

LO-CUT

FILTER

SWITCH

IN:

Provides

-3dB

attenuation

@

65Hz,

6dB/octave

OUT:

Bypasses

Lo-Cut

filter

action

TONE

CONTROL

SWITCH

IN:

Enables

EQ

filter

controls

OUT:

Bypasses

EQ

filter

controls

for

flat

response

FIGURE

1

FIGURE

2

(WMA-80

shown)

OPERATION

POWER

The

front-panel-mounted

rocker

switch

applies

power

to

the

amplifier

and

illuminates

when

power

is

applied.

EQUALIZATION

Equalizer

filter

controls

are

accessible

by

removing

the

front

cover

(WMA-D).

The

equalizer

provides

±8dB

at

ISO

centers

of

125,

20ft,

500,

800,

1.2k,

2k,

3.1k,

5k,

and

8kHz.

Response

is

flat

at

the

center

detent

position.

CAUTION

Removal

of

the

front

cover

presents

cut

electrical

shock

hazard.

For

this

reason,

adjustment

of

equalizer

filter

slide

controls

should

be

performed

by

qtmGfied

service

personnel

only.

LEVEL

CONTROLS

The

level

of

each

channel

is

controlled

by

an

individual

CHAN¬

NEL

control.

The

overall

output

level

is

controlled

by

the

MASTER

control.

The

T.ED

output

metftr

will

begin

to

illuminate

red

as

the

amplifier

reaches

full

output

power.

A

constantly

lit

red

LED

indicates

possible

signal

clipping.

AC

CIRCUIT

BREAKER

If

the

AC

circuit

breaker

trips,

the

power

switch

pilot

lamp

will

go

out

and

there

will

be

no

output.

Place

the

POWER

switch

in

the

OFF

position

and

reset

the

breaker

by

inserting

a

screwdriver

into

the

hole

on

the

front

panel

and

depressing

the

reset

switch.

Once

the

breaker

has

been

reset,

return

the

POWER

switch

to

ON.

If

the

breaker

trips

again,

the

difficulty

must

be

investigated

by

a

qualified

service

technician.

THERMAL

BREAKER

The

thermal

breaker

opens

when

the

temperature

at

the

output

transistor

heat

sink

reaches

105°C

(220°F).

If

the

breaker

opens,

there

will

be

no

output

but

the

power

switch

pilot

lamp

will

remain

illuminated.

Wait

approximately

two

minutes

for

the

breaker

to

reset.

If

the

breaker

resets

and

then

opens

again,

arrange

for

qualified

service

personnel

to

investigate

the

cause

of

the

tem¬

perature

overload.

This

may

be

due

to

improper

load

connections

or

excessive

environmental

heat

(ambient

air

temperature

above

40°C)

with

inadequate

ventilation.

SERVICE

CAUTION

Then?

are

no

user-semiceabh

parts

within

the

unit.

Refer

all

servicing

to

qtmlified

service

personnel

If

you

experience

difficulty

with

this

unit,

do

not

hesitate

to

ask

uur

advice

or

assistance.

Information

can

be

obtained

Dy

willing

to

Service

Department,

Bogen

Communications,

Inc.,

P.O.

Box

575,

Ramsey

NJ

07446.

Include

the

model

number

and

series

designa¬

tion

(a

letter

followed

by

numbers,

stamped

on

the

amplifier

chassis)

of

your

unit.

Describe

the

difficulty

and

include

details

on

the

electrical

connection

to

associated

equipment.

We

will

send

you

service

information

if

the

trouble

appears

simple,

or

the

name

and

nddre.ee

nf

the

nearest

authorized

Bogen

Service

agency

to

which

you

can

send

the

unit

for

repairs.

When

shipping

the

unit,

pack

carefully.

Send

the

unit,

insured

and

prepaid,

via

any

responsible

carrier.

The

unit

will

be

promptly

repaired

and

returned

collect

(freight

prepaid

while

in

warranty).

SPECIFICATIONS

Output

Power

Rating

WMA-80:

WMA-160:

80

Watts

@

4-ohms,

8-ohms/25V

(WMA-80),

25V

and

70V

160

Watts

@

4-ohms,

8-ohms,

25V

and

70V

Frequency

Response

20Hz

to

20kHz,

+0,-2dB

Distortion

Direct:

0.3%

(max.)

Transformer:

0.3%

(max.)

input

sensitivity/impedance

Module

Channels:

100mV/10-kilohms

Projector

Input:

IOOmV/10-kilohms

Mic.

Input:

.'Wty

V/300-oh

m

e

Equalization

±8dB

@

ISO

centers

of

125,

200,

315,

500,

800,1.2k,

2k,

3.1k,

5k,

and

8kHz

Hum

&

Noise

-75dB

or

better

Inputs

Low-Z

balanced

microphone,

Hi-Z

Projector,

6

input

module

ports

Lu-Cut

niter

-3dB

@

63Hz,

wu/octave

Outputs

Direct

-

4-ohms;

Transformer

-

8-ohms,

25V,

25VCT

(WMA-80),

70V

Controls

Level

controls

for

channels

1

-

6,

MIC,

PROJECTOR;

MASTER

Volume;

10

Equalizer

filter

slide

controls:

Illuminated

POWFR

switch;

LO-CUT

filter

switch;

TONE

IN/OUT

switch;

Push-to-Reset

circuit

breaker

Dimensions

BB-F

Flush-mount

Box:

BB-S

Surfaco

mount

Box:

WMA-D

Front

Cover:

24-3/4"H

x

14-1/4"W

x

3-7/8‘D

(62.8x36.2x9.8cm)

26-3/4*H

x

16-1/4-W

x

3-7/Q"D

(67.9x41.3x9.8cm)

26-3/4'H

X

16-1

/4"W

x

3/4"D

(67.9x41.3x1.9cm)

Power

Required

120V,

60Hz

AC

-

5

COMMUNICATIONS,

INC-

50

SPRING

STREET.

P,0.

Bo«

575

RAMSEY.

NJ

07446

(201)

934-8500