Carvin FX1644 Instruction Manual - Page 30

FX44

Mixer

Setting

Up

a

Sound

System

Section

5

2)

Connecting

the

Main

Amps

and

Speakers

Any

of

the

CARVIN

FX-44

consoles

can

be

used

for

Mono

or

Stereo

sound

reinforcement.

The

mixer

model

numbers

describe

the

particular

models

features.

The

number

represents

the

(number

of

channels)

X

(number

of

outputs)

format.

Therefore

the

FX1244

console

for

instance

is

a

(12

channel)

X

(4

stereo

output)

format.

This

means

that

12

input

channels

may

be

mixed

to

(4)

outputs

or

"stereo",

which

subsequently

may

be

summed

together

to

feed

a

mono

output.

For

the

sake

of

simplicity

we

will

show

how

to

hook

up

a

"stereo"

system

here.

3)

Powered

Mixers

and

Non

-Powered

Mixers

You

will

be

using

the

"LEFT

OUT"

and

"RIGHT

OUT"

XLR

jacks

as

the

main

pre

-amp

outputs

to

drive

your

power

amplifiers.

These

2

balanced

output

jacks

will

provide

the

lowest

noise

levels

for

signal

output.

The

same

snake

that

was

used

to

feed

the

signals

from

the

stage

to

the

mixer

usually

has

provisions

for

sending

output

signals

from

the

mixer

to

the

stage.

You

may

plug

the

(pre-amp

level)

LEFT

OUT

and

RIGHT

OUT

outputs

from

your

mixer

into

the

snake

cable.

This

will

send

the

signal

to

the

power

amplifiers,

usually

left

on

stage.

The

power

amplifiers

will

then

drive

your

speakers.

The

"2

TRK

OUT"

RCA

jacks

may

be

used

as

auxiliary

main

pre

-amp

outputs.

These

RCA

jacks

are

non

-balanced

outputs

and

generally

used

for

taping.

Once

the

snake

cable,

or

alternate

means

of

cabling,

carrying

the

signal

has

reached

the

stage,

the

connections

are

made

to

the

power

amplifiers.

The

power

amp

outputs

can

then

be

connected

to

the

speakers.

using

a

heavy

gauge

wire.

A

16

gauge

(AWG)

or

heavier

non

-

shielded

wire

is

recommended.

Note:

Your

speaker

cables

are

the

only

ones

that

should

not

be

shielded.

Alf

other

cables

in

your

system

that

carry

'Mic'

and

'Pre

-amp'

level

signals

should

be

shielded.

To

have

shielded

cables

connected

to

the

power

amp

outputs

of

your

amplifiers

could

result

in

damaging

the

amplifier

circuits.

4)

Powered

Mixers

With

powered

mixers (i.e.

mixers

with

built

in

power

amplifiers)

you

cannot

take

the

"LEFT

(MONO)"

and

"RIGHT

(MON1)"

post

amplifier

outputs

and

feed

them

through

the

snake

to

power

your

speakers

on

stage.

Doing

this

could

result

in

damage

to

the

power

amp

in

the

mixing

console.

Only

'Pre

-amp'

signals

can

be

returned

to

the

stage

through

the

snake.

Since

you

cannot

send

speaker

level

signals

up

the

snake

you

will

have

to

use

separate

speaker

cables.

These

cables

will

carry

the

signal,

from

the

powered

console

outputs,

directly

to

the

speakers.

A

16

gauge(AWG)

or

heavier

non

-shielded

wire

is

recommended.

Keep

in

mind

that

the

minimum

loading

for

"LEFT

(MONO)"

and

"RIGHT

(MON1)"

amp

outputs

is

4.0.

per

side.

Even

though

there

are

two

jacks

per

side.

Note:

Your

speaker

cables

are

the

only

ones

that

should

not

be

shielded.

All

other

cables

in

your

system

that

carry

Mic

and

Pre

-amp

level

signals

should

be

shielded.

To

have

shielded

cables

connected

to

the

power

amp

outputs

of

your

console

or

amplifiers

could

result

in

damaging

the

amplifier

circuits.

6)

Connecting

the

Monitor

Amps

and

Speakers

In

a

typical

setup

for

live

sound

the

"FX"

series

MON1

and

MON2

monitor

(auxiliary)

busses

will

be

used

to

provide

monitor

mixes

for

the

musicians

on

stage.

The

MON1

and

MON2

output

signals

will

be

sent

to

the

stage

just

like

the

main

output

signals.

The

signals

are

sent

to

the

stage

either

by

using

a

direct

shielded

wire

from

the

rear

of

the

mixer

or

by

using

the

snake.

The

signal

can

now

be

pluged

into

the

inputs

of

the

monitor

amplifiers

that

will

be

powering

the

monitor

speakers.

Remember:

ALL

monitor

sends

are

pre

-amp

level

and

are

non

powered.

These

signals

are

used

to

drive

power

amplifiers

that

subsequently

drive

your

monitor

speakers.

You

CANNOT

drive

loudspeakers

directly

from

the

"MON1"

and

"MON2"

outputs.

The

"MONO

OUT"

XLR

jack

would

normally

not

he

used

for

stereo

performances.

It

would

oe

used

in

a

Mono

set-uo.

where

the

signal

sent

to

the

loudspeakers

is

non

-stereo

or

mono.

The

XLR

"MONO

OUT"

delivers

is

the

combination

of

the

"LEFT

OUT"

and

"RIGHT

OUT"

signals.

Use

this

pre

-amp

out

when

you

need

only

Mono

signal,

like

during

a

lecture.

5-2

Carvin FX1644 Instruction Manual - Page 30

Connecting, Speakers, gauge

Page 30 highlights