GM-X422, GM-X322
8. OPERATIONS AND SPECIFICATIONS
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SETTING THE UNIT
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of the
speaker that is connected to the speaker output connector and the car
stereo system:
LPF/HPF Select
Audio frequency range
Speaker
Remarks
Switch
to be output
Type
LPF
(left)
Very-low-frequency range
Sub-woofer
Connect a sub-woofer.
OFF
(center)
Full range
Full range
HPF
(right)
Low-frequency range to
Tweeter
If you want to cut the very-
high-frequency range
low-frequency range
because it is not necessary
for the speaker you use.
Gain Control
If the sound is too low, even when the
volume of the car stereo used along with
this power amplifier is turned up, turn
gain control on the back of the power
amplifier clockwise. If the sound dis-
torts when the volume is turned up, turn
the gain control counter-clockwise.
•
Set the gain control to “NORMAL” when
this amplifier is connected to a Pioneer car
stereo with RCA output jacks. If the sound
is too low or distorts, adjust the gain con-
trol.
Power Indicator
The power indicator lights when the
power is switched on.
Bass Boost Level Control
Bass boost level control can boost the level
around the frequency selected by the bass
boost frequency control to 0 to 12 dB.
Bass Boost Frequency
Control (GM-X422)
You can select a bass boost frequency
from 40 to 120 Hz with the bass boost
control.
•
Bass Boost Level Control, Bass Boost
Frequency Control can be adjusted only
when the LPF/HPF select switch is set to a
position other than HPF.
BFC (Beat Frequency Control)
Switch
(ES and EW models)
If you hear a beat while listening to an
AM broadcast with your car stereo,
change the BFC switch using a small
screwdriver.
16
Fig. 8
Summary of Contents for GM-X322
Page 4: ...4 GM X422 GM X322 2 2 EXTERIOR Fig 2 ...
Page 9: ...9 GM X422 GM X322 5 6 7 8 A B C D 5 6 7 8 Fig 4 B A SIDE A OUT IN B ISOLATOR PCB ...
Page 10: ...10 GM X422 GM X322 A 1 2 3 4 B C D 1 2 3 4 A B B ISOLATOR PCB A MOTHER PCB ...
Page 11: ...11 GM X422 GM X322 5 6 7 8 A B C D 5 6 7 8 Fig 5 A SIDE B ...
