Pioneer GM-H200 User manual

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Service

cTVIamial

(i!)

PIONEER

The

Art

of

Entertainment

•

GM-H200/UC

ORDER

NO.

CRT1381

BRIDGEABLE

POWER

AMPLIFIER

_

_

_

GM-H2QO

GM-4SOO

ew

uc

NOTE:

•

In

this

unit,

an

electric

current

of

about

40A

flows

at

the

continuous

power

output

of

4Q

and

a

current

close

to

60A

flows

at

2Q.

Even

when

there

is

no

signal,

a

current

around

4A

flows.

There¬

fore,

make

a

test

at

an

appropriate

signal

level

in

consideration

of

the

power

consumption

of

the

power

supply

unit.

CONTENTS

1.

SPECIFICATIONS.

2

2.

CONTROLS

AND

THEIR

USE

(UC).

3

3.

CONNECTING

THE

UNITS

(UC)

.

4

4.

CONTROLS

AND

THEIR

USE

(EW)

.

7

5.

CONNECTING

THE

UNITS

(EW)

.

9

6.

DISASSEMBLY

.13

7.

CIRCUIT

DESCRIPTION.15

8.

CONNECTION

DIAGRAM

(UC)

.18

9.

SCHEMATIC

CIRCUIT

DIAGRAM

(UC)

.21

10.

SCHEMATIC

CIRCUIT

DIAGRAM

(EW).24

11.

CONNECTION

DIAGRAM

(EW)

.27

12.

EXPLODED

VIEW

.30

13.

PACKING

METHOD

.33

14.

ELECTRICAL

PARTS

LIST

.34

PIONEER

ELECTRONIC

CORPORATION

4-1,

Meguro

1-Chome.

Meguro-ku.

Tokyo

153,

Japan

PIONEER

ELECTRONICS

SERVICE

INC.

P.O.

Box

1760,

Long

Beach.

California

90801

U.S.A.

PIONEER

ELECTRONICS

OF

CANADA,

INC.

50S

Cochrane

Drive,

Markham,

Ontario

L3R

8E3

Canada

PIONEER

ELECTRONIC

[EUROPE]

N.V.

Keetberglaan

1.

9120

Beveren.

Belgium

PIONEER

ELECTRONICS

AUSTRALIA

PTY.

LTD.

178-184

Boundary

Road,

Braeside.

Victoria

3195,

Australia

TEL:

[03]

580-9911

©

PIONEER

ELECTRONIC

CORPORATION

1991

FA

MAY

1991

Printed

in

Japan

GM-H20D

SAFETY

INFORMATION

(UC

MODEL)

CAUTION

This

service

manual

is

intended

for

qualified

service

technicians;

it

is

not

meant

for

the

casual

do-it-yourselfer.

Qualified

technicians

have

the

necessary

test

equipment

and

tools,

and

have

been

trained

to

properly

and

safely

repair

complex

products

such

as

those

covered

by

this

manual.

Improperly

performed

repairs

can

adversely

affect

the

safety

and

reliability

of

the

product

and

may

void

the

warranty.

If

you

are

not

qualified

to

perform

the

repair

of

this

product

properly

and

safely,

you

should

not

risk

trying

to

do

so

and

refer

the

repair

to

a

qualified

service

technician.

WARNING

Lead

in

solder

used

in

this

product

is

listed

by

the

California

Health

and

Welfare

agency

as

a

known

reproductive

toxicant

which

may

cause

birth

defects

or

other

reproductive

harm

{California

Health

&

Safety

Code,

Section

25249,5).

When

servicing

or

handling

circuit

boards

and

other

components

which

contain

lead

in

solder,

avoid

unprotected

skin

contact

with

the

solder.

Also,

when

soldering

do

not

inhale

any

smoke

or

fumes

produced.

1.

SPECIFICATIONS

•

GM-H200/UC

•

GM-4200/EW

Power

source...14.4

V

DC

(10.8

■

15.6

V

allowable)

Grounding

system

..Negative

type

Current

consumption..40

A

(at

continuous

power,

412)

Average

current

drawn*.13

A

(412

for

two

channels)

18

A<412

for

one

channel)

Fuse.......30

Ax2

Dimensions.264

(W)

x

58

(H)

x

335

(D)

mm

[10

-

3/8

(W)

X

2

-

1/4

(H)

X

13

-

1/4

(D)

in.)

Weight

.7.0

kg

(15.4

Ibs.KLeads

for

wiring

not

included)

Maximum

power

output.200

W

x

2/600

Wxl

(EIAJ)

Continuous

power

output

.100

W

x

2/300

W

x

1

(at

412,

20

■

20,000

Hi,

0.05%

THD)

150

W

X

2

(at

212

,

20

■

20,000

Hz.

0.05%

THD)

Load

impedance

..412

(2

•

812

allowable)

Frequency

response

.10

-

50,000

Hz

1+0

dB,

-1

dB)

Stgnel-to-noise

ratio.105

dB

(IHF

-

A

network)

Distortion..0.001%

<at20W,

1

kHz)

Separation

.70dB(1

kHz)

Input

level.0.2

-2

V/8kl2

These

specifications

were

determined

and

are

presented

in

accordance

with

specification

standards

established

by

the

Ad

Hoc

Committee

of

Car

Stereo

Manufacturers.

Power

source.14.4

V

DC

(10.8

■

15.6

V

allowable)

Grounding

system.Negative

type

Current

consumption.40

A

lat

continuous

power,

412)

Average

current

drawn

*

.13

A

(412

for

two

channels)

18

A

(412

for

one

channel

(212

position)!

Fuse.30

Ax

2

Dimensions.264

(W)

x

58

(H)

x

335

(D)

mm

Weight.7.0

kg

ILeads

for

wiring

not

included)

Maximum

power

output.240

W

x

2/640

W

x

1

(EIAJ)

Continuous

power

output

.120

W

x

2/320

W

x

1

(at

412,

20

-

20,000

Hz,

0.05%

THD)

160

W

X

2

(at

212,

20

-

20,000

Hz,

0.05%

THD)

Load

impedance.412

(2

-

812

allowable)

Frequency

response.

5

-

50,000

Hz

(+0

dB,

-1

dB)

Signal-to-noise

ratio.105

dB

(IEC

-

A

network)

Distortion.0.0009%

(at

20

W,

1

kHz)

Separation

..70

dB

(1

kHz)

Input

level.RCA:

0.4

-

4

V

/8

k!2

DIN:

70

-

500mV

122

k!2

Note:

Specifications

and

the

design

are

subject

to

possible

modification

without

notice

due

to

improvements.

Note:

Specifications

and

the

design

are

subject

to

possible

modification

without

notice

due

to

improvements.

2

-^

GM-H200

2.

CONTROLS

AND

THEIR

USE

(UC

MODEL)

O

Power

Indicator

The

power

indicator

lights

when

the

power

is

switched

on,

©RCA

Input

Level

Control

Adjusting

the

RCA

input

level

control

will

help

match

the

output

of

the

car

stereo

to

the

Pioneer

amplifier.

If

the

output

is

low

even

when

the

volume

of

the

car

stereo

is

turned

up,

turn

this

control

clockwise.

If

there

is

distortion

when

the

volume

of

the

car

stereo

is

turned

up,

turn

this

control

counterclockwise.

•

Adjust

control

O

with

the

supplied

adjustment

screwdriver.

Keep

the

screwdriver

if

you

need

to

readjust

the

controls

later.

BFC

(Beat

Frequency

Control)

switch

Note:

Beating

is

the

combining

of

two

or

more

frequencies

to

produce

sum

and

difference

frequencies

called

beats.

If

beating

is

heard

when

listening

to

AM

stations

on

you

car

radio,

change

the

position

of

the

BFC

switch

on

the

bottom

of

the

amplifier

with

a

small

flat-bfaded

screwdriver.

BFC

switch

Compulsory

fan

cooling

system

This

is

a

high-power

amplifier,

so

it

produces

a

lot

of

heat.

To

keep

it

cool,

it

has

fan

cooling.

•

When

the

power

of

the

car

stereo

is

turned

on,

the

compulsory

cooling

fan

of

this

power

amplifier

works

automatically

and

cools

inside

of

this

amplifier.

•

Install

the

amplifier

so

there

is

enough

space

front

and

back

to

allow

the

fan

cooling

to

work

properly.

If

the

front

or

back

side

is

covered,

the

amplifier

may

malfunction

or

fail.

“xjmnnnnnnrirw^

Compulsory

fan

cooling

air

outlet

3

GM-H2QO

3.

CONNECTING

THE

UNITS

(UC

MODEL)

-

WARNINGS-

•

When

routing

leads

and

cords,

secure

them

with

cable

retainers

and

electrician's

adhesive

tape.

Also,

to

prevent

any

damage

to

the

insulation

on

the

leads

and

cords,

protect

them

with

electrician's

adhesive

tape

wherever

they

touch

sharp

edges.

Be

sure

to

use

a

rubber

O-ring

grommet

when

routing

wires

through

metal,

such

as

the

firewall

between

the

engine

and

passenger

compartments.

•

Keep

ail

wiring

away

from

hot

surfaces

or

heater

outlets

to

prevent

short

circuits.

•

Amplifier

ground

connections

(Black)

should

only

be

made

to

the

vehicle's

metal

body

or

chassis

for

safety

reasons.

The

ground

circuit

carries

the

same

current

as

the

power

lead

from

the

vehicle's

battery.

To

get

good

contact

when

grounding,

sand

the

metal

surface

to

expose

the

bare

metal.

If

using

multiple

amplifiers,

connect

all

amplifier

ground

leads

to

the

same

point

to

prevent

noise

problems.

•

Always

connect

the

supplied

special

(red)

battery

lead

directly

to

the

positive

(+)

terminal

of

the

battery.

•

It

is

recommended

that

the

speakers

connected

to

the

amplifier

have

the

minimum

ratings

shown

below.

If

a

speaker

has

a

rating

below

what

is

recommended,

it

may

be

damaged

when

the

volume

is

turned

up.

The

speaker

impedance

must

be

2

to

8

ohms.

Mode

Speaker

ratings

Two-channel

Maximum

200

W

Nominal

100W

One-channel

Maximum

600

W

Nominal

300

W

In

the

case

of

a

fult-range

speaker,

use

one

whose

maximum

rating

is

higher

than

the

maximum

rating

shown.

In

the

case

of

a

sub-woofer,

use

one

whose

nominal

rating

is

higher

than

the

nominal

rating

shown.

•

Never

connect

a

speaker

lead

to

ground

or

to

other

speaker

grounds.

The

protection

circuitry

will

operate

instantaneously,

turning

off

the

amplifier.

•

To

prevent

noise

problems,

keep

the

amplifier

power

leads

away

from

the

signal

cords

{RCA

cords)

and

speaker

leads.

Also,

keep

the

power

leads

away

from

any

antenna

cords.

•

Before

finalizing

the

installation,

turn

everything

on,

and

make

sure

everything

works

correctly

and

listen

for

noise

in

the

system.

•

For

detailed

information

on

connections

between

different

units

and

the

amplifier,

use

the

instruction

manuals

for

the

units.

It

is

important

to

follow

their

recommendations

precisely.

Connecting

the

special

red

battery

lead

Use

the

special

(red)

battery

lead

supplied

with

the

amplifier.

This

lead

contains

the

appropriately

rated

fuse

[30-amp

fuse

(x2)].

This

special

(red)

battery

lead

is

made

of

heavy

gauge

wire

so

it

is

capable

of

carrying

substantial

amounts

of

current.

Connect

both

of

the

two

terminals

at

each

end

of

the

battery

lead

securely.

Should

any

one

terminal

come

loose,

there

may

be

a

short

circuit,

perhaps

causing

electric

shock

or

even

a

fire.

Route

the

special

battery

lead

from

the

engine

compartment

through

the

firewall

or

vehicle

body

to

the

passenger

compartment

and

connect

it

to

the

amplifier.

Drill

an

14-mm

diameter

hole

in

the

firewall

or

vehicle

body

and

insert

an

O-ring

rubber

grommet

and

pull

the

battery

lead

through

into

the

passenger

compartment.

Note:

The

O-ring

rubber

grommet

is

important

because

it

protects

the

insulation

on

the

battery

lead

from

being

worn

away

from

normal

vibrations

and

rubbing

against

sharp

metal

edges.

Failure

to

install

this

grommet

could

result

in

a

short

circuit

and

fire.

While

installing

the

wires,

do

not

connect

the

positive

(+)

lead

of

the

battery

until

the

other

leads

have

been

connected.

This

will

prevent

accidental

shorting

to

any

other

wiring

or

ground.

After

making

all

other

connections

at

the

amplifier,

connect

the

battery

lead

terminal

of

the

amplifier

to

the

positive

{+}

terminal

of

the

battery-

vehicle

body.

After

all

the

other

leads

have

been

connected,

connect

both

terminals

to

the

positive

(+)

terminal

of

the

battery

After

making

all

other

connections

at

the

amplifier,

connect

the

battery

lead

terminal

of

the

amplifier

to

the

positive

(+)

terminal

of

the

battery.

A.

GM-HSOQ

Connecting

the

leads

(supplied)

Connecting

the

speaker

leads

The

speaker

output

mode

can

be

two-channel

(stereo),

one-

channel

(mono),

or

three-channel

(stereo

+

mono}.

Connect

the

speaker

leads

to

suit

the

mode.

To

connect

the

speaker

leads

to

the

speaker

terminals

of

the

amplifier,

see

the

connection

diagram

for

each

channel.

Be

careful

with

the

polarity

(+

and

-},

and

with

which

channel

ts

which

(left

[L]

and

right

[R]).

•

If

the

amplifier

is

used

in

three-channel

mode,

inductors

and

capacitors

are

needed.

For

more

information,

see

"Three-channel

mode

(stereo

+

mono)".

Two-channel

mode

(stereo)

5#irtir

©

»

©

©

L

©

©-ha-©

_t

f

t

t

©

®

©

e

Speaker

output

Speaker

output

(right)

(left)

One-channel

mode

(mono)

StMMi

M(mI

©

»

S

©

L

©

©—

Mm-©

The

following

examples

(1

and

2)

require

advanced

understanding

of

electronics.

If

you

do

not

understand

the

diagram,

please

have

the

work

done

by

your

nearest

authorized

Pioneer

installation

specialist.

Three-channel

mode

(stereo

+

mono)

The

power

amplifier

is

basically

a

two-channel/one-channet

bridgeable

amplifier,

but

three

channels

can

be

achieved

by

combining

the

stereo

and

mono

modes

using

inductors

and

capacitors.

Some

typical

examples

are

given

below.

Example

1

Three-channel,

two-way

system

5

GM-H2DO

Example

2

Three-channel,

three-wav

system

L

L

R

R

o

©

©

©

Left

tweeter/

-1

Len

twee

Ci

bQ'j

mid-high

-II-1

unit

unit

Left

mid-range/

mid-bass

unit

Mono-woofer/

subwoofer

Right

mid

range/

mid-bass

unit

Right

tweeter/

mid-high

unit

•

The

inductor

(LI

or

L2

in

the

diagram)

acts

as

a

low-pass

filter.

The

capacitor

(Cl

or

C2

in

the

diagram)

acts

as

a

high-pass

filter.

•

In

the

three-channel

mode

Pioneer

recommends

that

an

inductor

(U

be

used

on

the

woofer/subwoofer,

and

that

a

capacitor

(C)

be

used

on

the

midrange/tweeter.

Remem¬

ber

when

bridging

an

amplifier

it

will

see

only

half

of

the

original

speaker

impedance.

Therefore,

you

must

use

speakers

that

have

ratings

of

4

ohms

or

higher.

If

you

use

speakers

that

have

lower

impedance

ratings

it

may

cause

damage

to

the

amplifier.

•

When

the

inductors

and

capacitors

are

connected

to

the

speaker

leads,

secure

or

solder

them

so

they

cannot

be

pulled

loose.

Tape

or

use

heat

shrink

on

the

joints

to

prevent

short

circuits.

Setting

the

fitter

constant

i

Low-pass

filter

(tor

subwoofer/woof

e

r):

6

dB/octave

0"

O-

LI

■

Jo]

-OdB

2

High-pass

filter

(for

mid-tweeter/mid-high-tweeter):

6

dB/octave

f

3

Band-pass

filter

(combination

of

low-pass

filter

and

high-pass

fitter

for

mid-bes$/mid):

6

dB/octave

L2

Cl

©—Tmr-

0-

-1!-1

Component

Guide

Speaker

load

impedance

211

Ail

8Q

!

fc

(Hz)

LlmH)

C

(gF)

LlmH)

ClgF)

LlmH)

C

(gF)

so

5.4

1600

12.7

800

25,5

400

00

4.0

1000

8.0

500

16

250

125

2.5

560

5.1

300

to

160

200

1.6

400

3.2

200

6.4

100

320

1.0

250

2.0

125

4

62

500

0.64

160

1.3

80

2.6

40

800

0.4

100

0.8

50

1.6

25

1250

0.25

64

0.5

30

1,0

16

2000

0.16

40

0.3

20

0.64

10

3200

0,1

25

0.2

12.5

0.4

6.2

5000

0.06

16

0.13

8

0.26

4

0000

0.04

10

0.08

5

0.16

2,5

10000

0.03

_

0.06

4

0.13

2

•

A

multi-channel

system

can

be

set

up

using

a

combination

of

filters

1

,

2

,

and

3

.

The

inductance

(L)

and

capacitance

(C)

will

determine

the

frequency

(Hz)

that

the

speaker

will

reproduce.

Refer

to

the

chart

on

the

above

to

determine

the

components

required.

r-

WARNING

-

•

Use

the

capacitors

specified.

Non-polarized

capacitors

rated

at

over

±40

V

should

be

used

for

Cl

and

C2

in

the

diagram.

Because

of

the

voltage

output

of

the

amplifier

it

is

very

important

to

use

non-polarized

capacitors

rated

at

or

over

40

V.

This

will

prevent

a

safety

hazard.

6

GM-H200

4.

CONTROLS

AND

THEIR

USE

(EW

MODEL)

O

Power

Indicator

The

power

indicator

lights

when

the

power

is

switched

on.

ODIN

input

gain

and

RCA

input

level

controls

The

DIN

input

gain

and

RCA

input

level

controls

are

used

to

adjust

the

DIN

input

gain

and

RCA

input

level,

respectively.

Set

the

input

selector

to

suit

the

type

of

the

car

stereo

component

to

be

connected.

If

this

amplifier

is

connected

to

a

Pioneer

car

stereo

component

with

DIN

sockets,

set

the

DIN

gain

control

to

the

specified

position

(

■

).

If

the

amplifier

is

connected

to

a

Pioneer

car

stereo

component

with

RCA

pin

jacks,

set

the

RCA

level

control

to

the

specified

position

(•).

If

the

amplifier

is

connected

to

a

non-Pioneer

car

stereo

component

with

RCA

pin

jacks,

adjust

the

input

level

as

shown

in

Fig.

A

RCA

Level

4V

•

400mV

•

_

The

position

indicated

by

♦

represents

0.5

V.

Fig.

A

•

Adjust

control

•

with

the

supplied

adjustment

screwdriver.

Keep

the

screwdriver

in

case

you

need

to

readjust

the

controls

later.

Input

selector

Set

the

input

selector

to

Suit

the

car

stereo

component

connected

to

the

amplifier.

To

connect

the

amplifier

to

a

car

stereo

component

with

RCA

pin

jacks,

set

the

input

selector

to

the

left

side

(RCA

position).

To

connect

the

amplifier

to

a

Pioneer

car

stereo

component

with

DIN

sockets,

set

the

input

selector

to

the

right

side

(DIN

position).

Drive

mode

switch

If

the

impedance

of

the

speakers

used

with

the

amplifier

is

40

or

more,

slide

the

drive

mode

switch

on

the

rear

of

the

amplifier

to

the

right

{Normal

40).

If

one

channel

(mono)

is

used,

or

if

the

speaker

impedance

is

40

or

less,

slide

the

switch

to

the

left

(Dynamic/Bridge).

Input

selector

Drive

mode

switch

7

Grvf-HSOD

BFC

(Best

Frequency

Control}

switch

tf

beating

is

heard

when

listening

to

AM

stations

on

your

car

radio,

change

the

position

of

the

BFC

switch

on

the

bottom

of

the

amplifier

with

a

small

flat-bladed

screwdriver.

Compulsory

fan

cooling

system

This

is

a

high-power

amplifier,

so

it

produces

a

lot

of

heat.

To

keep

it

cool,

it

has

fan

cooling.

•

When

the

power

of

the

car

stereo

is

turned

on,

the

compulsory

cooling

fan

of

this

power

amplifier

works

automatically

and

cools

inside

of

this

amplifier.

•

Install

the

amplifier

so

there

is

enough

space

front

and

back

to

allow

the

fan

cooling

to

work

properly.

If

the

front

or

back

side

is

covered,

the

amplifier

may

malfunction

or

fail.

f

"i

i|

[51

\i

y

m

Compulsory

fan

cooling

air

outlet

B

GM-Haoo

5.

CONNECTING

THE

UNITS

{EW

MODEL)

Connect

the

components

as

shown

in

the

diagram.

•

Before

finalizing

installation,

turn

everything

on,

and

make

sure

everything

works

correctly

and

that

no

noise

is

getting

into

the

system.

•

When

routing

leads

and

cords,

secure

them

with

cable

retainers

and

electrician's

adhesive

tape.

Also,

to

prevent

any

damage

to

the

insulation

on

the

leads

and

cords,

protect

them

with

electrician's

adhesive

tape

wherever

they

may

touch

sharp

edges.

•

Keep

all

wiring

away

from

hot

surfaces

or

heater

outlets

to

prevent

short

circuits,

•

It

is

recommended

that

the

speakers

connected

to

the

amplifier

have

the

ratings

shown

below,

or

higher.

If

a

speaker

has

a

rating

below

that

recommended,

it

may

be

damaged

when

the

volume

is

turned

up.

The

speaker

impedance

must

be

2

to

8

ohms.

Mode

Speaker

ratings

Two-channel

Maximum

240

W

Nominal

120

W

One-channel

Maximum

640

W

Nominal

320

W

In

the

case

of

a

full-range

speaker,

use

one

whose

maximum

rating

is

higher

than

the

maximum

rating

shown.

In

the

case

of

a

sub-woofer,

use

one

whose

nominal

rating

is

higher

than

the

nominal

rating

shown.

Never

connect

a

speaker

lead

to

ground

or

to

other

speaker

grounds.

The

protection

circuitry

will

operate

instantaneously,

turning

off

the

amplifier.

To

prevent

noise

problems,

keep

the

power

leads

to

the

amplifier

away

from

the

signal

cords

and

speaker

leads.

Also,

keep

the

power

leads

away

from

any

antenna

cords.

Amplifier

ground

leads

(blackl

should

be

connected

to

a

solid

metal

part

of

the

vehicle

body.

If

using

multiple

amplifiers,

connect

all

amplifier

ground

leads

to

the

same

point

to

prevent

noise

problems.

To

get

good

contact

when

grounding,

you

may

have

to

sand

away

the

paint

to

expose

the

metal

underneath.

To

operate

the

amplifier

and

car

stereo

properly,

connect

the

battery

lead

and

the

accessory

power

lead

(red/black)

correctly.

If

the

leads

are

not

connected

correctly

or

are

not

connected

at

all,

the

amplifier

and

car

stereo

will

not

work.

To

connect

the

amplifier

to

the

RCA

pin

jacks

of

a

car

stereo

component,

use

an

audio

cord

with

RCA

pin

plugs.

To

connect

the

amplifier

to

the

DIN

socket

of

a

car

stereo

component,

use

a

DIN

connection

cord.

Both

kinds

of

cord

are

available

from

your

dealer.

Connecting

the

battery

lead

(red)

Route

the

positives)

battery

lead

(red)

from

the

engine

compartment

to

the

passenger

compartment

before

connecting

it

to

the

amplifier.

To

prevent

a

short

circuit,

only

connect

the

lead

after

connecting

all

the

other

leads.

Connect

the

two

wires

of

the

battery

lead

securely.

If

either

of

them

comes

loose

because

of

vibration

while

the

car

is

moving,

a

short

circuit

may

occur

and

a

fire

may

break

out.

Connect

these

terminals

securely

to

the

two

battery

terminals.

After

all

the

other

leads

have

been

connected,

connect

both

terminals

to

the

positrve

(+)

terminal

of

the

battery.

B

GM-HSOO

Connecting

the

leads

(supplied)

Connecting

the

speaker

leads

This

amplifier

can

select

two-channel

output

(stereo)

or

one-channel

output

(mono).

The

speaker

leads

must

be

connected

to

suit

the

mode

selected.

Connect

the

speaker

leads

to

the

output

terminals

of

the

amplifier,

paying

attention

to

the

polarities

<+

and

-)

and

lead

colors.

TWo-channel

mode

(stereo)

Sm*h

kW

©

«

©

©

L

©

0—hi

©

t

t

t

t

®

©

©

©

Speaker

output

Speaker

output

(right)

(left)

One-channel

mode

(mono)

•

Slide

the

drive

mode

switch

to

the

left

{Dynamic/Bridge).

Spwtor

lafet

©

*

©

©

L

©

©—

■

*.—©

Speakers

to

be

connected

to

the

amplifier

for

one

channel

(mono)

If

this

amplifier

is

used

for

one

channel

(mono),

its

nominal

output

is

320

W

(640

W

max.).

To

handle

this

output,

four

identical

speakers

with

nominal

inputs

of

80

W

or

more

should

be

connected

as

shown

below

(making

the

total

nominal

inputs

320

W

or

more).

The

output

volume

will

be

greater

than

when

only

a

single

speaker

is

used.

One-channel

(mono)

output

ID