Gain Control; Bfc (Beat Frequency Control) Switch; Lpf (Low-Pass Filter)/Hpf (High-Pass Filter) Select Switch - Pioneer GM-6300F Owner's Manual

Bridgeable four-channel power amplifier
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Gain Control

Adjusting the gain controls A and B will help match the output of the car stereo to the
Pioneer amplifier. Normally, set the gain controls to the NORMAL position. If the output is
low, even when the volume of the car stereo is turned up, turn these controls clockwise. If
there is distortion when the volume of the car stereo is turned up, turn these controls
counter-clockwise.
• If you only use one input plug, set the gain controls for speaker outputs A and B to the same position.
• When using with an RCA equipped car stereo (standard output of 500 mV), set to the NORMAL
position. When using with an RCA equipped Pioneer car stereo with max. output of 4 V or more,
adjust level to match the car stereo output level.

BFC (Beat Frequency Control) Switch

If you hear a beat while listening to an MW/LW broadcast with your car stereo, change the
BFC switch using a small standard tip screwdriver.

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
Switch
LPF (Left)
OFF (Center)
HPF (Right)
Audio frequency range
to be output
80 Hz and below with
–12 dB/oct. cut off slope
Full range
80 Hz and above with
–12 dB/oct. cut off slope
Speaker
Remarks
Type
Subwoofer
Connect a subwoofer.
Full range
Full range
Use if you want to cut the
very low frequency range
because it is not necessary
for the speakers you are
using.
4

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