GM-X622,GM-X522
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch
Set the LPF/HPF select switch as follows according to the type of
speaker that is connected to the speaker output connector and the car
stereo system:
LPF/HPF Select
Audio fr
equency range
Speaker
Remarks
Switch
to be output
T
ype
LPF
(left)
*
—
50 to 120 Hz
Sub-woofer
Connect a sub-woofer
.
OFF
(center)
Full range
Full range
HPF
(right)
*
50 to 120 Hz —
Full range
Use if you want to cut the
very-low-frequency range*
because it is not necessary
for the speakers you are
using.
*
See the “Cut Of
f Frequency Control” section.
Gain Control
If the sound level 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
distorts 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
level is too low or distorts, adjust the gain
control.
•
If you hear much noise when using the
speaker input terminals, turn the gain
control clockwise.
•
Adjust the gain control to the “MIN” side
of “NORMAL” when this amplifier is
connected to a Pioneer car stereo (High
voltage output type).
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 from 0
to 12 dB.
Bass Boost Frequency Control
Y
ou can select a bass boost frequency
from 40 to 120 Hz with the bass boost
control.
•
Bass Boost Level Control and Bass Boost
Frequency Control can be adjusted only
when the LPF/HPF select switch is set to a
position other than HPF
.
Cut Off Frequency Control
If the LPF/HPF select switch is set to
LPF
or HPF
, you can select a cut of
f
frequency from 50 to 120 Hz.
8.2 OPERATIONS
