Peavey Studiopro 40 User manual

STUDIO

Operating

Guide

INTRODUCTiON

AND

GENERAL

DESCRIPTION

Congratulations

on

your

purchase

of

a

Studio

Pro'“

40.

Reading

this

owners

manual

will

help

give

you

a

thorough

understanding

of

the

operating

principles

of

the

Studio

Pro’“

40

and

will

also

help

you

to

achieve

many

varied

and

diverse

tonal

settings.

'

The

Studio

Pro^“

40

is

a

40

watt

musical

instrument

amp

designed

specifically

for

demanding

studio

and

home

recording

applications.

The

Studio

Pro^"

40

is

also

equally

effective

as

a

medium

powered

system

for

club

work,

especially

when

microphone

and/or

direct

interface

with

the

mixing

console

is

employed.

This

amp

is

a

solid

state

unit

containing

some

of

the

most

unique

and

flexible

circuitry

for

obtaining

a

multitude

of

distortion

effects

as

well

as

undistorted

sounds

which

is

complimented

by

a

full

brace

of

equalization

to

create

almost

any

imaginable

tonal

color.

There

are

several

operating

principles

concerning

the

gain

controls

(pre

gain,

Saturation’",

post

gain)

and

equalization

controls

(low,

mid,

high/Pull

Thick)

which

should

be

fully

understood

to

achieve

the

best

tonal

results.

Please

read

this

owners

manual

and

keep

it

handy

and

refer

to

it

whenever

necessary

for

your

particular

applications.

WARNING:

TO

PREVENT

ELECTRICAL

SHOCK

OR

FIRE

HAZARD.

DO

NOT

EXPOSE

THIS

APPLIANCE

TO

RAIN

OR

MOISTURE.

BEFORE

USING

THIS

APPLIANCE,

READ

BACK

COVER

FOR

FURTHER

WARNINGS.

THE

FRONT

PANEL

ON/OFF

SWITCH

The

on/off

switch

is

a

rocker-type

switch

and

should

present

no

problems

in

operation.

In

the

on

position,

a

red

LED

will

illuminate

showing

that

power

is

being

supplied

to

the

unit.

MASTER

REVERB

The

amount

of

reverb

is

controlled

by

the

master

reverb

knob.

Turning

the

control

clockwise

increases

the

amount

of

delayed

(reverb)

signal.

Counterclockwise

will

decrease

the

reverb

effect.

The

reverb

may

also

be

remotely

controlled

with

the

optional

footswitch.

EQUALIZATION

SECTION

The

equalization

controls

(low.

mid,

high/Pull

Thick)

are

highly

effective

circuits

and

their

tonal

capabilities

are

designed

to

slightly

interact

with

each

other.

The

high

control

with

Pull

Thick

switch

The

high

control

is

used

to

tailor

the

amount

of

treble

(highs)

of

the

musical

instrument

and

the

preamp.

It

should

be

noted

that

when

using

distortion

(overload)

textures,

too

much

high-end

can

cause

a

harshness

that

will

detract

somewhat

from

the

warm,

tube-like

sound

of

the

Saturation”

circuit.

The

high

control

also

has

a

“pull"

switch

called

Thick.

When

activated.

Thick

acts

as

a

mid-range

boost

and

is

especially

useful

for

enhancing

the

distortion

characteristics

(Saturation’")

of

the

Studio

Pro

™

40,

NOTE:

WHEN

THIS

PULL

SWITCH

IS

ACTIVATED,

THE

HIGH

FREQUENCIES

MAY

BECOME

LESS

PRONOUNCED

BECAUSE

OF

THE

FULLNESS

ADDED

BY

THE

BOOSTED

MIDDLE

FREQUENCIES.

IN

ADDITION,

THE

ACTION

OF

THE

TONE

CONTROLS,

ESPECIALLY

THE

MIDDLE

CONTROL,

IS

LESS

PRONOUNCED

AND

EFFECTIVE.

The

Mid

Control

The

Mid

control

is

vital

to

the

tone

coloration

of

the

instrument’s

signal

—

especially

guitar.

A

good

“rule

of

thumb"

for

the

mid

control

is

to

cut

(reduce)

theamountofmidswhenclean,

undistorted

tonalities

are

desired.

Warmer

“fatter"

tonalities

for

enhancement

of

distortion

sounds

can

be

obtained

by

rotating

the

control

clockwise

(boost).

For

maximum

mid-range

boost,

use

the

Pull

Thick

switch

located

on

the

high

control

(see

high/Pull

Thick).

The

Low

Control

The

Low

control

determines

the

low

frequency

response

of

the

Studio

Pro'"

40.

Rotating

this

contr'

clockwise

increases

the

amount

of

bass

while

counterclockwise

rotation

reduces

the

low

end.

We

recommei

that

care

should

betaken

not

to

overboost

the

low

control.

Overboosting

low

frequencies

tend

to

prematurely

overload

the

power

amp.

Overboosting

of

the

low

control

also

reduces

the

system's

projection

capabilities,

usually

at

the

expense

of

the

middle

and

upper

frequencies.

THE

GAIN

SECTION

Post

Gain

Basically,

the

post

gain

control

acts

as

a

master

volume

and

sets

the

overall

gain

(volume)

level

for

the

Studio

Pro

™

40's

power

amp.

The

post

gain

control

also

provides

a

dual

purpose

and

this

must

be

understood

to

achieve

the

best

sounds

from

the

Studio

Pro

™

40's

clean/distortion

capabilities.

To

achieve

the

best

overload

(distortion)

from

the

Studio

Pro

™

40.

we

recommend

that

the

post

gain

control

be

set

no

higher

than

it’s

12

o'clock

or

#5

position.

Setting

the

post

gain

control

higher

than

5

may

cause

the

power

amp

(in

conjunction

with

the

pre

gain

and

Saturation'"

controls)

to

generate

its

own

harmonics

and

possibly

create

an

unpleasant,

harsh

sounding

distortion.

To

attain

maximum

power

reserve

for

clean

sounds,

the

post

gain

control

may

be

rotated

fully

clockwise

to

10.

(For

further

setting

recommendations

see

the

tone

setting

charts.)

Saturation

™

Control

The

Saturation'"

control

determines

the

amount

of

overload

and

can

be

varied

from

soft

distortion

sounds

(settings

of

0

to

5)

to

hard

rock

tonalities

(settings

of

5

to

10).

Please

remember

to

avoid

setting

the

post

gain

control

higher

than

5

when

using

the

Saturation

™

circuit

to

create

distortion

sounds

(see

post

gain

control

above).

Pre

Gain/Pull

Bright

Control

The

pre

gain

control

is

the

first

volume

control

of

the

system

and.

like

the

post

gain

control,

also

serves

a

dual

purpose.

If

the

post

gain

control

is

set

to

its

full

10

position

for

clean

tonalities,

the

pre

gain

control

should

be

positioned

somewhere

in

the

middle

of

its

range

or

lower.

Placing

the

pre

gain

control

higher

than

5

may

cause

unwanted

"square

waves”

(distortion)

and

result

in

premature

"clipping"

in

the

power

amp.

If

distortion

is

desired,

however,

both

the

pre

gain

and

post

gain

controls

should

be

placed

near

their

12

o’clock

or

#5

positions

and

the

amount

of

distortion

should

then

be

adjusted

with

the

Saturation'"

control.

The

pre

gain

control

also

employs

a

Pull

Bright

switch

which

adds

approximately

8

dB

of

boost

to

the

high

end.

As

with

the

high

EQ

control,

use

care

with

the

Pull

Bright

switch

when

using

a

distortion

sound

as

too

much

treble

may

cause

a

harsh

sound

at

the

power

amp/speaker

of

the

Studio

Pro'"

40-

INPUTS

The

Studio

Pro'"

40

has

two

inputs

labeled

1

and

2.

Input

1

is

the

input

which

should

normally

be

used

and

will

deliver

the

highest

signal

level

from

the

instrument

to

the

amp.

Sometimes,

however,

guitars

that

ar

equipped

with

very

high

output

"hot"

pickups

will

overload

the

high

gain

input.

This

will

be

apparent

becau

you

will

hear

some

unwanted

distortion

at

the

loudspeaker.

If

this

distorted

sound

does

occur,

piug

yourguitai

into

the

#2

input,

which

has

less

gam

(minus

6

dB)

than

input

1.

When

two

instruments

are

piugged

into

both

inputs,

the

#2

input

is

automatically

switched

to

the

same

level

as

input

#1.

NOTE:

WHEN

USING

TWO

INSTRUMENTS

OR

SIGNAL

SOURCES

WE

STRONGLY

RECOMMEND

THAT

THE

VOLUME

CONTROLS

BE

SET

AT

A

REASONABLY

LOW

VOLUME

LEVEL

TO

REDUCE

THE

POSSIBILITY

OF

UNDUE

DISTORTION

AND/OR

SPEAKER

DAMAGE,

ROCK

TONE

SETTINGS

NOTE:

THESE

TONE

SETTING

CHARTS

ARE

TO

BE

USED

AS

A

GENERAL

GUIDELINE

THEACTUAL

TONALITY

WHICH

RESULTS

WILL

DEPEND

UPON

THE

INSTRUMENT

USED

AND

YOUR

PARTICULAR

PLAYING

STYLE

AND

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GAIN

BLOCK

INSTRUCTIONS

The

following

are

two

examples

of

typical

clean

and

distortion

sounds

that

are

available

from

the

Studio

Pro

™

40.

NOTE;

They

are

meant

only

as

a

general

guideline.

For

further

tone/gain

setting

examples

see

the

tone

setting

charts.

A.

Clean

(Country/Jazz

styles)

(1)

Place

the

post

gain

control

between

8

and

10.

(2)

Position

the

Saturation

™

control

to

0

or

use

the

Automix

™

footswitch

to

defeat

the

Saturation

™

circuit.

(3)

Adjust

the

pre

gain

control

to

the

desired

volume

level.

(4)

Adjust

the

low,

mid

and

high/Pull

Thick

controls

to

taste.

(Add

Pull

Bright

if

desired)

(5)

Readjust

pre

gain

if

necessary.

B.

Distortion

(Rock'n'Roll/Rythm

&

Blues)

(1)

Place

the

pre

gain

control

between

5

and

7.

(2)

Place

the

Saturation

™

control

anywhere

in

its

range

from

0

to

10.

(3)

Increase

the

post

gain

control

to

the

desired

volume

level.

NOTE:

DO

NOT

PLACE

THE

POST

GAIN

CONTROL

HIGHER

THAN

IT'S

12

O'CLOCK

OR

#5

POSITION.

(4)

Adjust

the

equalization

section

to

taste

adding

Pull

Thick

if

desired.

(5)

Readjust

the

post

gain,

pre

gain,

and

the

Saturation

™

controls

if

necessary.

THE

BACK

PANEL

PREAMP

OUTPUT/POWER

AMP

INPUT

The

preamp

output

and

power

amp

input

jacks

are

used

for

patching

effects

devices

and

signal

processing

equipment

“in-line"

with

the

Studio

Pro

™

40.

Most

devices

such

as

flangers,

chorus,

tape/analog/digital

delays

or

gain

devices

such

as

distortion

units

can

be

used

within

this

“effects

loop”.

The

preamp

output

level

is

approximately

1

volt

RMS

and

is

of

relatively

low

impedance-600

ohms.

To

utilize

the

effects

loop,

use

a

high

quality

shielded

patch

cord

and

plug

one

end

into

the

preamp

output

and

the

other

end

into

the

external

device

input.

To

return

the

processed

signal

to

the

Studio

Pro

™

40.

use

a

second

high

quality

shielded

patch

cord

and

plug

one

end

into

the

external

unit

output

and

the

other

end

of

the

patch

cord

into

the

power

amp

input.

Since

this

method

of

using

an

effect

places

the

device

after

the

preamp/equalization

and

before

the

power

amp

you

will

have

a

greater

degree

of

control

over

the

sound

quality

of

the

device

or

signal

processing

unit.

The

preamp

output

can

also

be

used

to

send

the

signal

of

the

instrument/preamp

to

mixing

and

recording

consoles.

For

this

method

use

a

high

quality

shielded

patch

cord

and

make

the

connection

from

the

Studio

Pro

™

4

0's

preamp

output

to

the

desired

channel

of

the

mixer

or

to

ah

auxiliary

device

where

the

signal

is

not

to

be

returned

to

the

Studio

Pro

™

40.

With

this

method

of

sending

your

instrument’s

signal

to

a

mixer

or

auxiliary

device,

you

do

not

have

to

utilize

the

power

amp

input

as

the

signal

will

automatically

feed

the

power

amp

section.

LINE

OUTPUT

As

mentioned

above,

the

preamp

output

can

be

used

to

send

the

preamp

signal

to

a

recording/mixing

console,

but

the

mixer

operator

must

then

try

to

duplicate

the

sound

of

the

loudspeaker

at

the

mixer.

Although

this

is

a

useful

method

for

sound

reinforcement

and

the

recording

of

clean

tonalities,

the

results

are

often

less

that

satisfactory

when

using

a

distortion

type

of

sound.

For

best

results

we

recommend

using

the

line

output

of

the

Studio

Pro

™

40.

This

line

output

has

been

frequency

compensated

to

closely

duplicate

the

sound

of

the

loudspeaker

and

you

will

be

able

to

achieve

excellent

results

from

distortion

and

clean

sounds.

As

with

the

preamp

output/power

amp

input

connections,

use

a

high

quality

shielded

cord

to

make

the

connection

from

the

line

output

to

the

mixing/recording

console.

FOOTSWITCH

The

footswitch

jack

is

provided

for

the

connection

of

the

optional

Automix

™

footswitch.

The

footswitch

can

be

used

to

remotely

activate

or

defeat

Saturation

™

and

reverb

functions

of

the

Studio

Pro

™

40.

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STUDIO

PRO'"

40

SPECIFICATIONS

Power

Amplifier

Section;

Rated

Power

&

Load:

40

W

RMS

into

8

ohms

Power

at

Clipping:

(Typically

5%

THD,

1

KHZ.

120

Vac

line)

25

W

RMS

into

16

ohms

45

W

RMS

into

8

ohms

40

W

RMS

into

4

ohms

2

ohms

not

recommended

Frequency

Response:

+0,

-2

dB,

60

Hz

to

20

KHz

@

40

W

RMS

into

8

ohms

Total

Harmonic

Distortion:

Less

than

0

2%,

100

mW

to

40

W

RMS

60

Hz

to

10

KHz,

8

Ohms,

typically

below

0.1%

Hum

&

Noise:

Greater

than

90

dB

below

rated

power

Power

Consumption:

(Domestic)

150

watts,

50/60

Hz,

120

Vac

Preamp

Section:

The

following

specs

are

measured

@

1

KHz

with

the

controls

preset

as

follows:

Pull

Bright

Off

(In)

Saturation'"

@

0

Post

Gain

@10

Low

&

High

EQ

@

10

Mid

EQ

@

0

Pull

Thick

Off

(In)

Reverb

@

0

Nominal

Levels

are

with

Pre

Gain

@

5

Minimum

Levels

are

with

Pre

Gain

@

10

Preamp

Jack

“A"

Input:

Impedance:

High

Z.

220K

ohms

Nominal

Input

Level:

-28

dBV,

40

mV

RMS

Minimum

Input

Level:

-46

dBV,

5

mV

RMS

Maximum

Input

Level:

+4

dBV,

1.5

V

RMS

Preamp

Jack

“B”

Input:

Impedance:

High

Z,

44K

ohms

Nominal

Input

Level:

-22

dBV,

80

mV

RMS

Minimum

Input

Level:

-40

dBV,

10

mV

RMS

Maximum

Input

Level:

+10

dBV,

3

V

RMS

Preamp

Output:

Load

Impedance:

IK

ohms

or

greater

Nominal

Output:

0

dBV,

IV

RMS

Line

Output:

Load

Impedance:

1K

ohms

or

greater

Nominal

Output:

-10

dBV,

300

mV

RMS

Power

Amp

Input:

Impedance;

High

Z,

22K

ohms

Designed

Input

Level:

0

dBV,

IV

RMS

System

Hum

&

Noise

@

Nominal

Input

Level:

(20

Hz

to

20

KHz

unweighted)

70

dB

below

rated

power

Equalization:

Special

low,

mid

&

high

passive

EQ

circuitry

Pull

Bright:

+6

dB

@

2

KHz

Puli

Thick:

Special

EQ

Footswitch

Features:

Reverb

function

defeated

Saturation'"

function

defeated

Due

to

our

efforts

for

constant

improvement,

features

and

specifications

are

subject

to

change

without

notice.

DANGEH

EXPOSUAg

TO

extremely

HIOH

NOiSE

LEVELS

MAY

CAUSE

A

PERMANENT

HEARING

LOS$

INOlVlOUALS

VARY

CONSIDERABLY

IN

SUSCEPTIBILITY

TO

NOISE

INDUCED

HEARING

LOSS.

BUT

NEARLY

EVERYONE

WILL

LOSE

SOME

HEARING

IF

EXPOSED

TO

SUFFICIENTLY

INTENSE

NOISE

FOR

A

SUFFICIENT

TIME.

THE

U

S

GOVERNMENT

S

OCCUPATIONAL

SAFETY

AND

HEALTH

ADMINISTRATION

(OSHA)

HAS

SPECIFIED

THE

FOLLOWING

PERMISSIBLE

NOISE

LEVEL

EXPOSURES

DURATION

PER

DAY

IN

HOURS

BOUND

LEVEL

dBA.

SLOW

RESPONSE

6

90

6

92

4

9S

3

97

2

100

I'rV

102

1

105

lie

V*

Of

less

.fC.-U35!

.....

.K

ACC0RDlNG,IO3SS'l^iiM»IY

EXPOSURE

IN

dCESS

OF

THE

AeO<««i6RMISSIBLE^I:TS

MEAftdJ©

LOSS

^

^si?gj

EAR

PLUG^^kl^dflef^

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ear

OVER

THB^U^MUST

BE

SYSTElE^Gii£ti<3C^P^ENT

A

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IF

EXP0SUFi&it$i|MxCE^=^7l|^

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ABOVE

AGAIN^^^ENfiAtLVt^ttlB^AOUS'EXPO&U^-TO

HlQK-iMH^'PRESStWfg^ELS.

ALL

PERSONa.BXlibSED

TO

EGbSiJ^NT

CAPASL^-OF'^TOOUCINC

E«<J»$«0UND

LEVELS

SUCM^THIS

AWPLlFB^TlOM

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THIS

UNIT

IS^^^OPCRATION

THIS

AM^^JgR

HANDLK^^qSp£^AS10NAL

_

____

_

...

RECOmMSF^ED

since

THlKlSfCOULD

LO^C^PEAKER

SYSTEM

PLEASE

BE^AwAFlE

1

Read

belOfe

oroduct

?

;

EdstlJ^NT

CAPASL^-OF'^TOOUCINC

E«<^tOUND

levels

SU9«i^THI5

AWPLlFfl^TlOM

5Y5^jifi&E

PROT£CT^?p^YjHEARI^|!|^^|^TORS^^ft|^

HAS

BEEN

DESlGNECNWi&^ONSlf^TED

Ta^SCWlOE

ADEO^J^POWER^ESrat^jOR

PLAYINQ^i^EflN

WHICH

MAY

rI^RJIRE

TO

ONAL

PEAK

POWER.r«WI€QUAT€.J»OW!eP

HAS

BE»tfS?CSlGNED

INTfetT’rtK

SYSTEM

EjCT^WED

OB^TiON

AT

ABS(2t^jyi&MAXl(!il!lfl^fOW^t.Sv^

NOT

-

---

r,.

UAXfllil^-POWEttl^MeE

O0TA[NEO^|ih

VEfirjl^kl^SETTrN^it^Tp^e

GAIN

1

^

cr.

ilh*f

Hn

AnT

Hc

are

product

All

$afely

and

operating

instructions

should

be

retained

lor

future

reference

Obey

all

cautions

m

the

operating

instructions

and

on

die

back

of

the

unit

All

operating

instructions

should

be

followed

This

product

should

not

Pe

used

near

water

i

e

a

bathtub

sink

swimrning

pool

wet

bascmeni.

etc

This

product

should

be

located

so

that

its

position

does

r^ol

interfere

wUh

its

proper

ventilation

It

should

not

be

placed

flat

against

a

wall

or

placed

m

a

built-in

enclosure

that

will

impede

the

flow

of

cooimg

air

This

product

should

not

be

placed

near

a

source

of

heat

such

as

a

stove

heater

radiator

or

another

heal

producing

amplifier

*

power

supply

^t^^pe

marked

onUMlifnit

We

power

supply

conC..'

•

::?•

9

Never

break

off

the

ground

on

the

power

supply

cord

For

more

information

on

grounding

write

lor

our

free

booklet

‘Shock

Hazard

and

Grounding

‘

Power

supply

cords

should

always

be

handled

carefully

Never

walk

or

place

eOu'pment

on

power

supply

cords

Periodically

check

cordsfor

cuts

or

signs

of

stress

especially

at

the

plug

and

the

point

where

the

cord

exits

the

umt

The

power

supply

cord

should

be

unplugged

when

the

unit

is

to

be

unused

tor

long

periods

of

bme

Metal

parts

can

be

cleaned

with

a

damp

rag

The

vinyl

covering

used

on

some

units

can

be

cleaned

with

a

darnp

rag

or

an

ammonia

based

household

cleaner

It

necessary

10

12

so

thari^i^is

do

noi

raD^^^ids

are

the

unit

thrOtf^^ilhe

ventilationhtifto

or

any

other

openings

This

umt

should

be

checked

by

a

qualified

service

technician

if

A

The

power

Supply

cord

or

plug

has

been

damaged

S

Anything

has

fallen

or

been

spilled

mio

the

unit

C

Tne

unit

does

not

operate

correctly

D

The

unit

has

been

dropped

Or

the

enclosure

damaged

The

user

should

not

attempt

to

service

this

equipment

All

service

work

should

be

done

by

a

quatifiod

service

technician

WARNING:

THIS

UNIT

IS

EQUIPPED

WITH

A

3-WIRE

MAINS

CABLE

WHICH

SHOULD

BE

USED

WITH

SUITABLE,

GROUNDED

RECEPTACLES.

DO

NOT,

UNDER

ANY

CIRCUMSTANCES,

REMOVE

THE

GROUND

ON

THE

3-WIRE

MAINS

(POWER)

CABLE.

PEAVEY

ELECTRONICS

CORPORATION

711

A

Street

/

Meridian,

MS

39301

/

U

S

A.

©

1932

Printed

in

U

S.A.

00349042

7/82

Peavey StudioPro 40 User manual

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