Bedienungsanleitung DLS CA51 (Seite 6 von 16) (Englisch)

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Input Level control

The input level control, 5V – 0,25 V,

matches the output of your radio to

the input of the amplifier. After instal-

lation is complete, make sure the in-

put of the amplifier is turned down all

the way ( counter-clockwise at 5V ).

All amplifiers include high pass filter

( HPF ) and low pass filters ( LPF). On CA23 the

high pass filter is used as a subsonic filter.

All filters are continously variable and all filters can

be switched on and off. CA31 & CA51 also includes

a subsonic filter.

The HPF ( high pass filter ) blocks very low

frequencies from reaching the speakers. It is mostly

used at say 60 Hz to protect small speakers ( like

6 inch and smaller ) from deep bass. It can also be

used as subsonic filter to take away the very

deepest frequencies from a bass box. The typical

setting is then around 25 – 40 Hz. In CA23 the

high pass filter is designed as a subsonic filter

variable from 15 Hz to 150 Hz.

The slope of the High pass filter is 12 dB / octave.

The filter can be switched off if you want to run the

amplifier in full range mode.

High Pass Filter / Subsonic filter

HPF

Off On

50Hz 220Hz

15Hz

500Hz

Low Pass Filter

LPF

Off On

80Hz 200Hz

50Hz

500Hz

The LPF ( low pass filter ) mostly used for

subwoofers. It will allow low frequencies only and

blocks higher frequencies.

A typical setting is 50 – 80 Hz.

The filter can be switched in and out. In the CA23

amplifier you can select between two different

slopes, 12 dB/ octave or 24 dB/ octave.

Choose the slope and the setting that sounds best

in your car.

LPF

Off 24 dB

80Hz 200Hz

50Hz

500Hz

12dB

CA22 CA23

Subsonic

Off On

40Hz 100Hz

15Hz

150Hz

To ensure best possible performance from the

amplifiers a switch is installed to select between Hi

and Low input.

When using High Level input:

Push in the button to position

”Hi Level”

When using Low level input:

Push out the button to position

”Low Level”

If the switch is set to wrong position, the amplifier

still works, but the risk for disturbances or distortion

increases.

Hi / Low level input switch

CA22, 23, 31, 41 & 51

Hi level

Low level

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 ra-

dio and amplifier levels are matched.

Grand bass on CA23 & CA41

Grand Bass is used to increase the bass volume

at an interval of bass frequencies. You can select

the center frequency between 25Hz and 80 Hz

and the amplification between 0 dB ( no

amplification ) and 18 dB ( full amplification ).

The slope of the filter is 10 – 12 dB at maximum

setting.

This function is used to compensate for the bass

box function and to adjust for your own taste of

bass. Set level control at 0 dB if you want it to be

inoperative.

The phase control on CA31 & CA51 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 that

the bass sound is coming from the front. If you dont

get the result you want, also try to

phase reverse the subwoofer

connections and make

a new adjustment.

Phase control CA31 & CA51

0 180

PHASE

Subsonic filter CA31 & CA51

The Subsonic filter blocks the very

deepest frequencies from reaching the

subwoofers. It has a fixed frequency

of 25 Hz and can be switched On / Off.

For sub channels C (CA31) and E

(CA51) only.

Subsonic

Off On

Level

0,25V

Grand Bass

40Hz

60Hz

25Hz 80Hz

0dB 18dB

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