Switch Settings - Alpine PDR-M65 Mode D'emploi

SWITCH SETTINGS

NOTE:
• Before switching each Selector Switch, turn off
the power and insert a small screwdriver, etc.,
perpendicularly to the Switch.
PDR-M65
Fig. 10
PDR-F50
Subsonic Filter (PDR-M65 only)
The subsonic filter for cutting ultra low
frequencies from the input signal before being
amplified.
This is desirable for several reasons:
– To protect speakers too small or not capable
– To minimize power wasted from reproducing
– To protect subwoofers in vented enclosures
Crossover Frequency Adjustment Knob
(PDR-M65: LP FILTER)
Use this control to adjust the crossover
frequency between 50 to 400 Hz.
of reproducing ultra low frequencies.
inaudible sound.
from over excursion below the tuning
frequency.
Bass EQ Adjustment Knob (PDR-M65 only)
Add a 50 Hz bass boost up to +12 dB to tune
your bass response.
Input Gain Adjustment Control
Set the PDR-M65/PDR-F50 input gain to the
minimum position. Using a dynamic CD as a
source, increase the head unit volume until the
output distorts. Then, reduce the volume 1 step
(or until the output is no longer distorted). Now,
increase the amplifier gain until the sound from
the speakers becomes distorted. Reduce the
gain slightly so the sound is no longer distorted
to achieve the optimum gain setting.
Crossover Mode Selector Switch (PDR-F50
only)
a) Set to the "OFF" position when the
amplifier will be used for driving
full range speakers or when using
Fig. 11
an external electronic crossover.
The full frequency bandwidth will
be output to the speakers with no
high or low frequency attenuation.
b) Set to the "HP" position when the
amplifier is used to drive a tweeter/
midrange system. The frequencies
below the crossover point will be
attenuated at 12 dB/octave.
NOTE:
• In this case the maximum Bass EQ
boost level is reduced.
Fig. 12
c) Set to the "LP" position when the
amplifier is used to drive a
subwoofer. The frequencies above
the crossover point will be
attenuated at 12 dB/octave.
ALPINE PDR-M65/PDR-F50 68-25285Z55-A (EN/FR/ES)
EN
FR
ES
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