Alpine PXA-H701 owner manual Over

X-OVER

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.

	Cutoff frequency
	adjustment range		Slope adjustment
	(1/6 octave steps)
	H.P.F.	L.P.F.	H.P.F.	L.P.F.
Front 1	1kHz –	1.1kHz –	6/12/18/	6/12/18/
(Front speaker 1)				24/30dB/
	18kHz	20kHz	24/30dB
Select TWEETER				Filter OFF
Front 1	20Hz –	22Hz –	6/12/18/	6/12/18/
(Front speaker 1)			24/30dB/	24/30dB/
	18kHz	20kHz
Select FULL RANGE			Filter OFF	Filter OFF
Front 2	20Hz –	22Hz –	6/12/18/	6/12/18/
			24/30dB/	24/30dB/
(Front speaker 2)	18kHz	20kHz
			Filter OFF	Filter OFF
Rear	20Hz –	22Hz –	6/12/18/	6/12/18/
			24/30dB/	24/30dB/
(Rear speaker)	18kHz	20kHz
			Filter OFF	Filter OFF
Center*	20Hz –	22Hz –	6/12/18/	6/12/18/
			24/30dB/	24/30dB/
(Centre speaker)	18kHz	20kHz
			Filter OFF	Filter OFF
Sub.W	20Hz –	22Hz –	6/12/18/	6/12/18/
			24/30dB/	24/30dB
(Subwoofer)	180Hz	200Hz
			Filter OFF

*If centre is set as subwoofer, the adjustment range changes to the range of subwoofer.

Signals with these frequencies output

Slope OFF

	Slope adjustment
20Hz	10kHz
H.P.F. cutoff frequency	L.P.F. cutoff frequency

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.

15-EN