Alpine Multimedia Manager PXA-H900 Owner's Manual page 21

3
Adjust the volume.
• When using RCA-type connections, use the
PXA-H900's VOL
display "5" (on the PXA-H900's display).
• When using Ai-NET connections, perform the
head unit's volume operation to display "5" (on
the head unit's display).
When the CDA-7990 is combined as a head
unit, adjust to "–50dB".
4
Press the AUTO AEQ button.
5
Press the or
speaker environment for outputting the correction
signals.
FRONT.ON SubWf. ON
A UTO ADAP T IV E EQ
F RONT . ON S
U
P USH [ ENT ER] TO S TART
and VOL buttons to
button to select the channel or
FRONT.ON SubWf. OFF FRONT.OFF SubWf. ON
L R
bW ON .
• The Adaptive Equalizer flattens
the overall bass response, both
the SPL and the phase. Depend-
ing on how noisy your vehicle is,
a flat SPL response may cause
low bass notes to be masked by
road noise. In such cases, use the
conventional EQ features of the
PXA-H900 to gently "tilt up" the
low bass response. Again, listen
for a few weeks to allow your
ears and brain to recalibrate and
become used to the flat sound.
• After the automatic adjustments
are performed, the sound from
the different speakers arrives at
the listening position at virtually
the same time. If you are
accustomed to delays in the bass
sound (which is common with
conventional systems), the sound
may seem somewhat strange to
you. If so, increase the
subwoofer delay time slightly to
achieve sound closer to that of
home audio systems.
• Heavy bass speakers do not
reproduce medium low
frequencies (150 to 400 Hz) well
(the sound tends to be distorted).
When using such speakers, lower
the subwoofer's cutoff frequency.
• If the volume of the subwoofer is
too low after the automatic
adjustment procedure is
performed, the adjustments have
not been performed properly.
Refer to step 2 under "Prepara-
tions for automatic adjustments"
and perform the adjustments
again.
• Depending on the speaker
settings (on or off), certain
speakers may not be displayed
(in which case they cannot be
set).
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