Gemini SCRATCH MASTER PMX-18 User manual

Table of contents

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MASTER

—

SOUND

PRODUCTS

WITH

SOUND

IDEAS

PMX-18

Stereo

Preamp

Mixer

Instruction

Manual

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Multi

Language

Instructions

English

Deutsch

Espanol

Francais

Italiano

.

2

-

4

5-7

8-10

11-13

14-16

III

lllll

Page

1

Introduction

Cautions

Congratulations

on

purchasing

a

Gemini

model

PMX-18

mixer.

This

state

of

the

art

mixer

includes

the

latest

features

and

is

backed

by

a

three

year

warranty.

Prior

to

use,

we

suggest

that

you

carefully

read

all

the

instructions

Features

■

2

Phono,

2

Line

and

1

Mic

■

Bass,

Treble

and

Balance

controls

for

the

master

output

■

Individual

channel

gain

controls

■

Dual

mode

display

(

Left

&

Right

output

or

Channel

1

and

Channel

2)

■

Removable

transforming

switches

■

Cue

Fader

■

3

year

warranty

■

Multi

language

instruction

manual

Words

to

the

wise

1.

All

operating

instructions

should

be

read

before

using

this

equipment.

2.

To

reduce

the

risk

of

electrical

shock,

do

not

open

the

unit.

There

are

NO

USER

REPLACEABLE

PARTS

INSIDE.

Please

refer

servicing

to

a

qualified

service

technician.

3.

Do

not

expose

this

unit

to

direct

sunlight

or

to

a

heat

source

such

as

a

radiator

or

stove.

4.

This

unit

should

be

cleaned

only

with

a

damp

cloth.

Avoid

solvents

or

other

cleaning

detergents.

5.

When

moving

this

equipment,

it

should

be

placed

in

its

original

carton

and

packaging.

This

will

reduce

the

risk

of

damage

during

transit.

DO

NOT

EXPOSE

THIS

UNIT

TO

RAIN

OR

MOISTURE.

DO

NOT

USE

ANY

SPRAY

CLEANER

OR

LUBRICANT

ON

ANY

CONTROLS

OR

SWITCHES.

Connections

1.

Make

sure

that

the

POWER

(1)

switch

is

in

the

off

position.

The

POWER

LED

(2)

will

be

off.

2.

This

unit

comes

supplied

with

a

15

volt

AC

adaptor.

Plug

the

male

pin

of

the

adaptor

into

the

rear

panel

POWER

JACK

(24).

Then

plug

the

adaptor

into

a

proper

power

source.

3.

To

connect

the

mixer

to

your

amplifier,

use

the

OUTPUT

AMP

(30)

jacks

on

the

rear

panel

4.

If

you

desire

to

record

your

mix,

connect

the

OUTPUT

REC

(31)

jacks

to

the

input

of

your

reel

to

reel

or

cassette

recorder.

The

record

output

level

will

vary

as

you

raise

and

lower

the

CHANNEL

LEVEL

(8,9)

slides

and/or

the

GAIN

(11,12)

controls.

Tonal

changes

can

be

made

by

varying

the

BASS

(16)

and

TREBLE

(17)

controls.

5.

The

unit

is

equipped

with

one

microphone

input.

The

MIC

JACK

(3)

is

a

1/4"

(6.35

mm)

and

is

located

on

the

front

panel.

6.

On

the

rear

panel

are

2

stereo

PHONO

(25,27

)

inputs

and

2

stereo

LINE

(26,28)

inputs.

The

PHONO

(25,27)

inputs

will

accept

turntable

inputs

only.

A

GROUND

(29)

screw

for

you

to

ground

your

turntables

is

located

on

the

rear

panel.

The

stereo

LINE

(26,28)

inputs

will

accept

any

line

level

input

like

a

CD

player

or

a

cassette

player.

7.

Headphones

can

be

plugged

into

the

front

panel

mounted

HEADPHONE

(10)

jack.

Operation

1.

POWER

ON:

Once

you

have

made

all

the

equipment

connections

to

your

mixer,

press

the

POWER

SWITCH

(1).

The

power

will

turn

on

and

the

POWER

LED

(2)

will

glow

RED.

2.

CHANNEL

1:

The

GAIN

(11)

control

and

the

CHANNEL

LEVEL

SLIDE

(8)

allow

you

to

fully

adjust

the

selected

source.

PHONO/LINE

(6)

switch

allows

you

to

select

either

line

1

or

phono

1

to

play

on

channel

1.

Page

2

3.

CHANNEL

2:

The

GAIN

(12)

control

and

the

CHANNEL

LEVEL

SLIDE

(9)

allow

you

to

fully

adjust

the

selected

source.

PHONO/LINE

(7)

switch

allows

you

to

select

either

line

2

or

phono

2

to

play

on

channel

2.

4.

CROSSFADER

SECTION:

The

CROSSFADER

(13)

allows

the

mixing

of

one

source

into

another.

The

left

side

of

the

CROSSFADER

(13)

is

channel

1

and

the

right

side

is

channel

2.

The

CROSSFADER

(13)

in

your

unit

is

REMOVABLE

and

if

the

need

arises

can

be

easily

replaced.

Crossfader

units

are

available

in

two

sizes.

Part

#

RF-45

(which

is

identical

to

the

crossfader

supplied

with

the

your

unit)

has

a

45

mm

travel

from

side

to

side.

Also

available

is

part

#

RF-30

which

has

a

30

mm

travel

distance.

Just

purchase

either

of

these

crossfader

units

from

your

Gemini

dealer

and

follow

these

instructions.

5.

MICROPHONE

SECTION:

The

MIC

SWITCH

(4)

controls

the

microphone

functions

and

the

MIC

LEVEL

CONTROL

(5)

controls

the

microphone

volume.

The

MIC

SWITCH

(4)

is

a

three

position

switch.

When

it

is

in

the

left

position,

the

microphone

is

off,

in

the

center

position,

the

microphone

is

on,

and

in

the

right

position,

the

microphone

is

on

and

talkover

is

activated.

Talkover,

when

activated,

will

reduce

the

overall

volume

of

the

mix

without

effecting

the

microphone

volume.

You

will

find

this

feature

very

useful

when

you

need

to

make

announcements

over

the

music.

6.

OUTPUT

CONTROL

SECTION:

The

level

of

the

AMP

OUT

(30)

is

controlled

by

the

MASTER

(14)

control.

The

BALANCE

(15)

control

will

allow

the

Amp

Out

signal

to

be

balanced

between

the

left

and

right

speakers.

The

BASS

(16)

and

TREBLE

(17)

controls

allow

you

to

fine

tune

your

output

signal.

7.

CUE

SECTION:

By

connecting

a

set

of

headphones

to

the

HEADPHONE

(4)

jack,

you

can

monitor

any

or

all

of

the

channels.

By

sliding

the

CUE

FADER

(18)

control

to

the

left

you

will

be

able

to

monitor

the

channel

1

output.

Sliding

to

the

right

will

monitor

the

channel

2

output.

The

headphone

volume

can

be

raised

or

lowered

by

using

the

CUE

LEVEL

(19)

control

8.

DISPLAY:

The

dual

function

DISPLAY

(20)

indicates

either

the

MASTER

(14)

output

left

and

right

levels

or

the

channel

1

and

channel

2

levels

as

dictated

by

the

GAIN

(11,12)

controls.

You

can

choose

the

option

you

want

by

pressing

the

DISPLAY

BUTTON

(21)

*

9.

TRANSFORMING

SECTION:

A.

Description:

Most

DJs

use

the

Phono/Line

switches

on

their

mixer

to

do

Transforming.

By

grasping

the

switch

between

two

fingers,

shaking

back

and

forth

would

change

the

input

from

Phono

to

Line

to

Phono

to

Line,

etc.

This

would

result

in

a

stuttering

type

effect.

The

problem

with

it

is

that

the

Phono/Line

switches

often

break

and

repairing

them

is

costly.

B.

TRANSFORM

SWITCHES:

Your

mixer

is

equipped

with

two

removable

Transforming

Switches.

These

switches

turn

their

channel

from

off

to

on

to

off,

etc.

This

results

in

the

same

type

stuttering

effect.

The

TRANSFORM

SWITCHES

(22,23)

have

been

positioned,

by

the

factory,

to

move

from

side

to

side.

By

unscrewing

the

4

screws

from

the

TRANSFORM

SWITCH

(22,23)

plate,

you

can

turn

the

switch

in

90

degree

implements.

This

allows

up/down,

down/up,

right/left

or

left/right

positioning.

TRANSFORM

SWITCH

(22)

controls

channel

1.

TRANSFORM

SWITCH

(23)

controls

channel

2.

C:

PROCEDURE:

Set

both

CHANNEL

LEVEL

SLIDE

(8,9)

to

your

required

levels.

With

the

CROSSFADER

(13)

to

the

right

(channel

2),

moving

TRANSFORM

SWITCH

(23)

from

white

to

orange

to

white

will

result

in

a

stuttering

effect.

With

the

CROSSFADER

(13)

to

the

left,

moving

TRANSFORM

SWITCH

(22)

will

give

the

same

results.

You

can

vary

the

effect

by

flipping

the

switch

faster

or

slower,

longer

or

shorter..

D.

ADDITIONAL

EFFECTS:

Set

both

CHANNEL

LEVEL

SLIDE

(8,9)

to

your

required

levels.

Place

TRANSFORM

SWITCH

(22)

in

the

orange

position.

Slide

the

CROSSFADER

(13)

from

the

right

to

a

position

approximately

1/3

of

the

way

towards

the

left.

(Channel

2

should

still

be

playing

through

the

speakers.).

By

moving

TRANSFORM

SWITCH

(22)

from

orange

to

white

to

orange,

you

will

turn

channel

1

on

and

off

(stuttering)

while

channel

2

continues

to

play

to

your

audience.

E.

REPLACEMENT:

To

replace

a

defective

TRANSFORM

SWITCH

(22,23)

,

remove

the

4

screws

from

the

plate

and

carefully

lift

up.

and

unplug

the

cable.

Plug

the

new

switch

into

the

cable

and

place

it

back

in

the

mixer,

turning

it

until

the

direction

is

proper.

Screw

the

plate

down

with

the

4

screws

and

you

are

ready

to

transform.

Page

3

Specifications

INPUTS:

DJ

Mic

.

,1.5mV

2Kohm

unbalanced

Phono.

.3mV

47Kohm

Line.

.150

mV

27Kohm

OUTPUTS:

Amp.

Max.

.OdB

IV

400ohm

.20V

Peak

to

Peak

Rec.

.225mV

5Kohm

GENERAL:

Bass.

.+/-

12dB

Treble.

.+/-

12dB

Gain

(Chnls

1-2).

.0

to

-20dB

Frequency

Response

....

.20Hz

-

20KHz

+/-2dB

Distortion.

.0.02%

S/N

Ratio.

.better

than

80dB

Talkover

Attenuation.

.-16dB

Headphone

Impedance..

.16ohm

Power

Source.

....115/230V

50/60HZ

15W

Dimfinsions.

.10"

x

7

1/2"

x

3"

254mm

x

192mm

x

71mm

Page

4