Alpine PDP-E800DSP Owner's Manual page 20

Time Correction Tab
1
2
The time correction allows individual adjustments
for each speaker output to align the different
distances of each speaker relative to the listener's
position inside the cabin.
Adjustments can be done for level, delay and phase
(0°/180°)
1 Assistance for time delay adjustment
A very accurate automatic time delay calculator
is built directly into the app.
To begin this setup, you have to measure the
physical distance of each speaker in the system
that has been assigned to an output channel.
Verify that your measurement value is correct.
Assign each speaker location to an output
channel. Enter the measurement of each
speaker's distance to the driver's seat headrest.
When all values have been entered simply press
the "APPLY" button to store these measurements
into each output channel the PDP-E800DSP.
The rotary knobs can still be used to make even
finer adjustments if required.
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2 Delay Setting
Allows adjustment of each independent output
channel audio signals to compensate for the
differences of poor speaker placement, relative
to the driver's seating position in vehicles.
For the selected channel volume, delay setting
and Phase inversion 180° can be adjusted.
The group selection allows you to
create up to 4 different delay
groups. Changes will affect all
channels allocated to the group.
Channel muting on/ off
Phase inversion on/ off
Channel delay on/ off