Bedienungsanleitung DLS a7 (Seite 7 von 26) (Englisch)

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Crossovers / filters (general)

DLS A-series amplifiers include highpass filter

(HP) and lowpass filters (LP).

The HP-filters can be used in one of two ways.

Either as a subsonic filter together with a

subwoofer to remove the lowest frequencies which

often causes a rumbling bass reproduction. A nor-

mal setting is 20 - 30 Hz.

The HP-filter can also be used together with a front

or rear stereo system to remove frequencies below

the crossover setting. In a system with a separate

subwoofer it´s normal to limit the bass reproduction

to the front system. A normal setting is between 80

- 100 Hz, but feel free to try other settings.

If you have problems with the mid bass driver

”reaching the bottom” (the voice coil reches the bot-

tom pole plate) at high volumes, use the HP-filter

to avoid this with a setting at 50 - 80 Hz.

A subsonic filter is actually a HP-filter.

The LP-filters are normally used when you connect

a subwoofer in bridge mode. The filter can be

switched in and out. A normal setting is 60 - 80 Hz.

The filter slope is 12 dB.

Active crossover.

A4 and A7 the LP and HP-filters have a frequency

range making it possible to use them for active

crossover to a 2-way speakersystem.

DLS A2 och A3

DLS A2 and A3 has an adjustable LP-filter that can be

switched in/out. It can be set from 50 - 125 Hz. There

is also an adjustable HP-filter that can be switched

in/out.The filter is adjustable from 20 - 200 Hz.

PHASE SHIFT BUTTON ON A3:

DLS A3 has a button marked ”PHASE”. Use this

button to phase reverse the speaker output. The

button is only working when the lowpass filter is in

use. Only use this button when you want to phase

reverse a subwoofer to get the best sound.

DLS A4

DLS A4 is equipped with adjustable HP-and LP- filt-

ers on all channels. These can also be switched in/

out. The filters are equipped with a multiplication

button for improved flexibility.

The filter setup are as follows:

Front:

Lowpass (LP) 50 - 125 Hz

Highpass (HP) 20 - 200 Hz alt 60 - 600 Hz (x 3 button)

Rear:

Lowpass (LP) 45 - 200 Hz alt. 90 - 400 Hz (x 2 button)

Highpass (HP) 20 - 200 Hz

The x2 and x3 buttons are used if you run a 2-way

system with active crossover between mid-bass and

tweeter.

DLS A5

Front channels:

DLS A5 has an internal adjustable HP-filter that can

be switched in/out. It can be set from 50 up to 150

Hz.

Sub / mono channel:

The mono channel filters are for use only with one or

more subwoofers There is a LP-filter adjustable from

40 up to 90 Hz, and a subsonic filter at 25 Hz that

can be switched in-out.

DLS A6

DLS A6 is a mono amplifier for use only as a

subwoofer amplifier.

It has a fixed 25 Hz subsonic filter that can be switched

in/out.

It also has a LP-filter adjustable from 50 - 125 Hz.

This filter can not be disconnected.

DLS A7

This is a five channel amplifier with a lot of filter

possibilities described in detail on page 8.

Crossovers on each model

ULTIMATE A-series

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DLS a7 Seite 7

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