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Settings/Adjustments
Crossover network
The PXI-H990 is equipped with an active dividing network allowing the bands to be split before
amplification by the power amplifier.
Because of this, there is no need for a passive network between the speakers and amplifiers and the
amplifiers are fully independent, thus eliminating the problem of interference and making it
possible to achieve the optimum acoustic space by dividing the playback frequencies in a way
suited to the capacities of the speakers.
This adjustment requires special knowledge and experience. Should problems arise, please see your
authorized 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 Bandwidth
(1/6 Octave Steps)
Slope Adjustment
H.P.F. L.P.F. H.P.F. L.P.F.
20Hz 18kHz
1kHz 18kHz
20Hz 18kHz
20Hz 18kHz
20Hz 18kHz
1kHz 18kHz
20Hz 18kHz
20Hz 18kHz
1kHz 18kHz
20Hz 18kHz
20Hz 18kHz
1kHz 18kHz
20Hz 18kHz
20Hz 160Hz
FRONT
FRONT TW
FRONT MID
FRONT WF
REAR
REAR TW
REAR WF
FRONT C
FRONT C TW
FRONT C WF
REAR C
REAR C TW
REAR C WF
SUBWOOFER
22Hz 20kHz
1.1kHz 20kHz
22Hz 20kHz
22Hz 20kHz
22Hz 20kHz
1.1kHz 20kHz
22Hz 20kHz
22Hz 20kHz
1.1kHz 20kHz
22Hz 20kHz
22Hz 20kHz
1.1kHz 20kHz
22Hz 20kHz
22Hz 180Hz
6/ 12/ 18/ 24/ 30dB/
Filter OFF
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6/ 12/ 18/ 24/ 30dB
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6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB
6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB/
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6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB/
Filter OFF
6/ 12/ 18/ 24/ 30dB