Bedienungsanleitung Alpine PXA-H701 (Seite 17 von 52) (Englisch)

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The PXA-H701 is equipped with an active

crossover allowing the frequency bands to be

split before amplification. Because of this, there

is no need for a passive network between the

speakers and amplifiers. This makes the

amplifiers fully independent, eliminating the

problem of interference. This also makes it

possible to achieve the optimum acoustic space

by dividing the playback frequencies in a way

suited to the speaker’s response.

This adjustment requires sufficient knowledge

and experience. If you have problems, we

suggest you have the adjustment made by your

store authorized of Alpine dealer.

Adjust the high pass filter (H.P.F.) and low pass

filter (L.P.F.) and set the slope (filter response

attenuation slope) for the different bands.

Make the adjustments according to the playable

frequency ranges and frequency responses of

the connected speakers.

20Hz 10kHz

The H.P.F. setting cannot be the same as or

exceed the L.P.F. setting for that channel.

• The crossover network is a filter that divides

specific frequency bands.

• The high pass filter is a filter that cuts

frequencies below a certain frequency (bass

frequencies) and lets through treble

frequencies.

• The low pass filter is a filter that cuts

frequencies above a certain frequency

(treble frequencies) and lets through bass

frequencies.

• The slope is a value expressing the

attenuation of the signal in decibels when the

frequency is increased or decreased by one

octave.

• The higher the slope value, the steeper the

slope.

• If the slope is set to “OFF”, the signal does

not pass through the filter, so there is no

effect.

• In order to protect the speakers, if Tweeter is

selected in Front 1, there is no filter OFF

(slope OFF) setting for H.P.F.

For the same reason, the subwoofer low

pass filter cannot be turned off (the slope

cannot be set to “OFF”.)

• Tweeters may be damaged if low frequency

signals are input to them.

Signals with these frequencies output

Slope adjustment

Slope OFF

H.P.F. cutoff frequency L.P.F. cutoff frequency

Cutoff frequency

adjustment range

(1/6 octave steps)

Slope adjustment

H.P.F. L.P.F. H.P.F. L.P.F.

Front 1

(Front speaker 1)

Select TWEETER

6/12/18/

24/30dB

6/12/18/

24/30dB/

Filter OFF

1kHz –

18kHz

1.1kHz –

20kHz

Front 1

(Front speaker 1)

Select FULL RANGE

6/12/18/

24/30dB/

Filter OFF

6/12/18/

24/30dB/

Filter OFF

20Hz –

18kHz

22Hz –

20kHz

Front 2

(Front speaker 2)

6/12/18/

24/30dB/

Filter OFF

6/12/18/

24/30dB/

Filter OFF

20Hz –

18kHz

22Hz –

20kHz

Rear

(Rear speaker)

6/12/18/

24/30dB/

Filter OFF

6/12/18/

24/30dB/

Filter OFF

20Hz –

18kHz

22Hz –

20kHz

Center*

(Centre speaker)

6/12/18/

24/30dB/

Filter OFF

6/12/18/

24/30dB/

Filter OFF

20Hz –

18kHz

22Hz –

20kHz

Sub.W

(Subwoofer)

6/12/18/

24/30dB/

Filter OFF

6/12/18/

24/30dB

20Hz –

180Hz

22Hz –

200Hz

* If centre is set as subwoofer, the adjustment

range changes to the range of subwoofer.

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