Bedienungsanleitung DLS cat 31 (Seite 5 von 12) (Englisch)

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Important

Use either the low level or the high level input, do

not use both at same time.

Low level input

Use a pair of shielded stereo audio cables with RCA

type jack. The cable length varies depending on type

of vehicle. Most cables can be

bought in lengths from 1 up

to 5,5 meters.

Avoid placing the RCA cable

close to speaker cables,

power cables and remote

control cable. Connect to in-

put socket A & B.

High Level Input

Connect left and right speaker wires coming from

the car stereo to the high level input as shown. You

must connect both plus and minus as the inputs are

balanced, connecting plus only gives lower level and

bad sound quality. By changing the polarity of plus

and minus, you can change the phase.

Hihg level input socket.

Automatic turn on when using high level input.

With the Hi/Low input swich set to Hi, the amplifier turns

on automatically on high input. You don´t need to connect

a separate remote wire from your head unit.

When using High Level input:

Set the switch to position ”Hi / Level”

When using Low level input:

Set the switch to position ”Low / Level”

If the switch is set to wrong

position, the amplifier still

works, but the risk for

disturbances or distortion

increases.

Input and controls

Input Level control ch. A/B/C (Level)

Subsonic filter ch. C

The Subsonic filter blocks the very

deepest frequencies from reaching the

subwoofers. The filter crossover is 25

Hz and can be disconnected.

Low pass filter ch. C (LPF)

The LPF ( low pass filter ) allow low

frequencies only and blocks higher

frequencies. A typical setting is 60 – 80

Hz. Choose the setting that sounds best

in your car.

Phase control ch. C (PHASE)

The phase control can be set

continuously from 0 - 180 degrees. This

is very useful when you want to adjust

the bass sound for best front stage image.

Start on 0 and turn the control slowly

clockwise until you experience the bass

sound coming from the front.

You may have to change the polarity of

the speaker connection to get the best

result.

High Input

White :A ch.+

White/black :A ch.-

Grey/black :B ch.-

Grey :B ch.+

Input Wiring

Inputs may be low level from the RCA output of the car

stereo or high level from the car stereo speaker

output.Low level = RCA is to prefer for the best sound

quality.

CAT31

Subsonic

Off On

LPF

50Hz 120Hz

The input level control, 5V – 0,25 V,

matches the output of your radio to the

input of the amplifier. After installation

is complete, make sure the input of the

amplifier is turned down all the way

( counter-clockwise at 5V ). Play a tape

or CD, make sure all bass or treble

settings or equalizer are flat, and turn

the volume of the radio up until you

just start to hear distortion. Turn the

volume control down just a bit. On the

amplifier increase the input level control

( clockwise or to the right ) until you just

start to hear distortion, then back the

level control just a bit. Now your radio

and amplifier levels are matched.

Level

5 V 0,25 V

Phase

180

Hi / Level

Low / Level

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DLS cat 31 Seite 5

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