Bedienungsanleitung DLS a 3 ultimate (Seite 8 von 26) (Englisch)

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The LP-filter on the rear channels is used when

you run a 2-way or 3-way speaker system with

active crossover. It will allow low frequencies only

and blocks higher frequencies. The filter can be

switched in and out.

The normal frequency range is from 0,3 to 4 kHz.

With the LP x10 switch, under the bottom plate,

you can change the filter frequency range from the

normal to 3 - 40 kHz. A normal x-over setting is 3-4

kHz when used for active crossover in a 2-way sys-

tem.

If you run a 3-way system on the amplifier you can

use this filter for active crossover between midbass

and midrange speakers. A typical setting is 400 Hz.

The sub channel is made only for subwoofer use

and has a variable LP-filter. A normal setting for the

LP-filter is 60-80 Hz.

FRONT SPEAKERS

+LEFT- +RIGHT-

REAR SPEAKERS

+LEFT- +RIGHT-

SIGNAL INPUTS

FRONT REAR

LEFT RIGHT LEFT RIGHT

3,5V

7V 0,2V

3,5V

7V 0,2V

LEVEL

x20 change

by bottom switch

240

80 400

OUT

HP-filter

240

80 400

OUT

HP-filter

0,3 4

kHz

OUT

LP-filter

LEVEL

x10 change

by bottom switch

Lowpass filter on rear channels

x10 change

by bottom switch

0,3 4

kHz

OUT

LP-filter

Amplifier front

x 20

x 1

x 10

Input

Front Rear

Input

Sub

Front

input to

rear & sub

Rear

input to

sub

Sub input

from rear

Sub input

separate

LP x10 swith under the bottom plate

Filters on sub

channel

Crossovers / filters on A7

DLS A7 amplifier include highpass filter (HP),

lowpass filter (LP). On the two front channels the

HP-filter can be switched between two different

frequency ranges, likewise for the LP-filter on the

rear channels.

The slope of the HP-filter is

12 dB / octave.

The filter can be switched

off if you want to run the

amplifier in full range mode.

Or use as a HP-filter for

tweeters if you want to run

a 2-way speaker system

with active crossover. The

HP x20 switch under the

bottom plate changes the

filters frequency range from

the normal 80-400 Hz to

1600 - 8000 Hz. A normal

setting is 3-5 kHz.

If you run a 3-way system

on the amplifier you can use

this filter for active cross-

over between midbass and

midrange speakers, a

typical setting is 400 Hz.

Highpass filter on front channels

Highpass filter on rear channels

x20 change

by bottom switch

240

80 400

OUT

HP-filter

Amplifier front

x 20

x 1

x 10

Input

Front Rear

Input

Sub

Front

input to

rear & sub

Rear

input to

sub

Sub input

from rear

Sub input

separate

This HP-filter is normally

used as a high pass filter

blocking very low frequencies

from reaching the speakers.

It is mostly used at say 80 Hz

to protect small speakers

( like 6 inch and smaller ) from

deep bass.

The slope of the HP-filter is

12 dB / octave.

The filter can be switched off

if you want to run the amplifier

in full range mode.

240

80 400

OUT

HP-filter

ULTIMATE A7

Lowpass

50 125

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DLS a 3 ultimate Seite 8

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