If sound level is too low, even The power indicator lights when the volume of the car stereo used along power is switched on. with this power amplifier is turned up, turn gain control on 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.
GM-X622,GM-X522
� If you hear much noise when using the
speaker input terminals, turn the gain control clockwise. Cut Off Frequency Control
� Adjust gain control to the �MIN� side
of �NORMAL� when this amplifier If the LPF/HPF select switch is set to connected to Pioneer car stereo (High LPF or HPF, you can select a cut off voltage output type). frequency from 50 to 120 Hz.
LPF (Low-Pass Filter)/HPF (High-Pass Filter) Select Switch Bass Boost Level Control
Set LPF/HPF select switch as follows according to the type of Bass level control can boost the that is connected to speaker output connector and the car level around the frequency selected by stereo system: the bass boost frequency control from 0 LPF/HPF Select Audio frequency range Speaker Remarks Switch to be output Type
LPF (left) * � 50 to 120 Hz Sub-woofer Connect a sub-woofer. OFF (center) Full range
to 12 dB.
Bass Boost Frequency Control
You can select a bass boost frequency HPF (right) * 50 120 Hz � Full range Use if you want to cut the from 40 to 120 Hz with the bass boost very-low-frequency range* control. because it is not necessary
� Level Control and Bass Boost for the speakers you are Frequency Control can be adjusted only using. when the LPF/HPF select switch is set to a position other than HPF.
* See the �Cut Off Frequency Control� section.
