Pioneer DEH-P9450MP Operation Manual page 36

Audio Adjustments
Level
The difference in reproduced levels between
speaker units can be corrected.
Slope
Adjusting the H.P.F./L.P.F. slope (filter attenua-
tion slope) lets you adjust the continuity of
sound between speaker units.
• The slope indicates the number of decibels
(dB) the signal is attenuated when the fre-
quency is one octave higher (lower) (Unit:
dB/oct.). The steeper the slope, the more the
signal is attenuated.
Phase
You can switch phase (normal, reverse) for
each speaker unit's input signal. When the con-
tinuity of sound between speakers is imprecise,
try switching phase. This may improve the con-
tinuity of sound between speakers.
Points concerning network adjustments
Cut-off frequency adjustment
• With the low-range speaker installed in the
rear tray, if you set the "L LPF" cut-off fre-
quency high, bass sound is separated so that
it appears to come from the rear. You are rec-
ommended to set the "L LPF" cut-off frequen-
cy to 100 Hz or lower.
• The maximum input power setting for middle-
and high-range speakers is usually lower than
that for low-range speakers. Remember that if
the "M HPF" or "H HPF" cut-off frequency is
set lower than required, strong bass signal
input may damage the speaker.
Level adjustment
• The basic frequencies of many musical instru-
ments are in the middle range. First perform
middle-range level adjustment, followed by
high-range and then low-range level adjust-
ment in that order.
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Slope adjustment
• If you set a small absolute value for the slope
(for a gentle slope), interference between
adjacent speaker units can easily result in
degraded frequency response.
• If you set a large absolute value for the slope
(for a steep slope), continuity of sound
between speaker units is degraded, and
sounds appear to be separated.
• If you set the slope to 0 dB/oct. (Pass), the
audio signal bypasses the filter, so the filter
does not have an effect.
Phase adjustment
• When the cross-over point value for filters on
both sides is set to –12 dB/oct., the phase is
reversed 180 degrees at the filter cut-off fre-
quency. In this case, reversing the phase
assures improved sound continuity.
Normal phase
Muting the speaker unit (filter)
You can mute each speaker unit (filter). When a
speaker unit (filter) is muted, no sound is output
from that speaker.
• If you mute the selected speaker unit (filter),
"MUTE" blinks and no adjustments are possi-
ble.
• Even if any speaker unit (filter) is muted, you
can adjust the parameters for other speaker
units (filters).
1. Press AUDIO and then press NW to
select the network adjustment mode.
Reverse phase
Crossover point