Peavey PA 120 Manual de usuario

120

The

new

PA-120

compact

portable

sound

rein-

forcement

MIXER/AMPLIFIER

featuring

rugged

100

Watt

power

stage.

This

compact

but

powerful

unit

capable

handling

most

any

club

lounge

perfor-

mance

well

the

smaller

concerts.

Because

the

super

heavy

duty

silicon

output

devices

and

the

large

aluminum

heat

sink

the

PA-120

has

the

extra

measure

durability

required

for

demanding

commercial

applications

The

PA-120

four

channel

mixer/amplifier

with

the

capability

handling

four

microphones

instruments

because

its

extremely

wide

dynamic

range.

Each

channel

the

120

features

separate

volume,

bass,

treble,

and

reverb

controls

enable

the

operator

control

each

microphone

instrument's

tone

and

response

characteristics.

The

master

section

the

PA-120

provides

overall

volume

and

main

reverb

controls

for

added

flexibility.

These

master

controls

enable

the

operator

fully

control

the

output

order

create

balanced

sound.

The

reverb

effect

controllable

from

the

optional

remote

footswitch.

The

volume

control

serves

vary

the

gain

the

preamp.

The

preamps

the

new

120

are

the

variable

feedback

type

which

allow

lowest

noise

and

maximum

performance,

The

reverb

control

used

vary

the

amount

reverb

signal

from

the

individual

channels.

The

con-

tinuously

variable

control

allows

the

operator

mix

any

amount

reverb

desired.

The

reverb

signal

mix-

into

the

delay

line

rotating

the

reverb

control

clockwise

until

adequate

reverb

obtained.

Remember

that

the

master

reverb

control

must

turned

before

individual

reverb

takes

effect.

The

bass

control

determines

the

low

frequency

response

the

individual

channel.

The

120

bass

control

type

electronic

crossover

which

acts

volume

control

for

the

low

frequencies.

Because

the

design

this

control,

possible

obtain

both

bass

boost

and

cut.

The

vertical

position

(between

and

will

yield

flat

response.

Clockwise

operation

results

boost

and

counter-clockwise

operation

results

cut

The

treble

control

determines

the

high

frequency

response

the

individual

channel.

The

treble

control

part

electronic

crossover

and

functions

volume

control

for

the

high

frequencies.

The

vertical

position

(between

and

yields

flat

response,

while

clockwise

settings

boost

highs

and

counter-clockwise

settings

yields

treble

cut.

The

input

jacks

are

designed

high

impedance

microphone

instrument.

MASTER

SECTION

Field

experience

has

proven

that

professional

mix-

er/amplifier

must

equipped

with

full

set

master

controls.

While

the

bass,

treble,

and

reverb

controls

enable

good

tonal

mix

the

individual

channels,

difficult

obtain

good

overall

balance

unless

the

master

controls

are

present

The

master

reverb

the

control

that

determines

how

much

the

delayed

(reverb)

signal

blended

back

into

the

master

mixer.

The

master

reverb

return

level

control

and

must

turned

before

any

reverb

effect

heard

the

output.

The

master

reverb

level

should

set

that

the

individual

reverb

send

controls

each

the

channels

have

adequate

control

variation.

The

master

volume

control

controls

the

gain

the

master

mixer

use

variable

negative

feedback

The

use

active

mixing

allows

your

120

Mix-

er/Amplifier

perform

well

many

studio

mixing

consoles.

This

method

the

same

used

the

latest

recording

mixers

and

yields

the

lowest

distortion

and

noise

than

any

other

method.

The

master

volume

sets

the

level

for

the

entire

system.

The

master

volume

should

set

approximately

the

middle

position

(4-

6),

and

fine

adjustment

volume

should

made

with

the

individual

controls

each

channel.

The

reverb

footswitch

jack

provides

method

for

reverb

cut

off

use

the

optional

remote

footswitch.

Any

footswitch

with

the

proper

plug

(stan-

dard

phone

plug)

and

shielded

cable

will

work

with

this

jack

The

pilot

light

indicates

when

power

applied

the

amplifier

10.

The

three

wire

line

cord

has

been

provided

for

your

protection

and

should

connected

the

proper

line

voltage

indicated

the

back

panel.

NOT

REMOVE

GROUND

PLUG.

11.

The

fuse

located

within

the

cap

the

fuse

holder

and

should

replaced

with

one

the

proper

value

should

fail.

necessary

that

the

proper

value

fuse

used

avoid

damage

the

equipment

and

avoid

voiding

the

warranty.

Models

that

have

circuit

breakers

can

reset

depressing

the red

button.

the

breaker

trips

repeatedly,

take

the

unit

qualified

service

center

for

inspection.

12.

The

line

power

switch

the

three

position

type

with

the

center

position

being

off.

The

three

posi-

tion

switch

has

two

positions

which

are

used

ground

the

amplifier

properly.

One

the

positions

will

yield

the

least

hum

popping

when

the

microphone

touched

and

this

the

position

that

should

used.

13.

The

speaker

output

jacks

are

designed

used

with

total

load

FOUR

OHMS.

Speaker

systems

higher

impedance

can

used

with

slight

loss

output

power.

Speaker

systems

with less

than

total

four

ohms

can

used

with

the

risk

overloading

the

power

amplifier.

Slightly

less

power

will

delivered

lower

impedances

because

the

uni-

que

limiting

action

our

integral

protection

system.

The

power

amplifier

built

large

aluminum

heatsink

cool

the

output

devices.

thermostat

connected

this

heatsink

shut

the

system

down

case

overheating.

Low

speaker

impedances

tend

cause

the

amp

run

hotter

than

normal,

and

could

cause

the

automatic

cutoff

operate

the

output

stage

becomes

hot

enough

endanger

the

output

devices.

The

ther-

mostat

self

re-setting

and

normal

operation

will

restored

when

the

unit

reaches

safe

operating

temperatures.

thermal

shutdown

apparent

then

you

are

overloading

the

system

and

continued

use

this

manner

will

damage

the

system.

Never

use

less

than

ohm

total

load

the

120

module.

The

output

voltage

available

from

this

unit

approximately

VRMS

into

ohms

with

proper

line

input.

14.

The

large

line

cord

retainers

the

rear

panel

are

provided

for

your

convenience

storing

the

line

cord

during

transport

the

unit.

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