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4
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.
Input Select Switch
For two-channel input, slide this switch
to the left. For four-channel input, slide
this switch to the right.
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 frequency range
Speaker
Remarks
Switch
to be output
Type
LPF (Left)
* — 40 Hz to 500 Hz
Subwoofer
Connect a subwoofer.
OFF (Center)
Full range
Full range
HPF (Right)
* 40 Hz to 500 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 Off Frequency Control” section.
Input Switch
It is possible to input from a car stereo external output (subwoofer output) or a car stereo
speaker output. When using an external output (subwoofer output), slide the switch to the
left. For connection instructions, see the “Connection Diagram” section. When using a
speaker output, slide the switch to the right. In this case, it is necessary to use the supplied
speaker input wire with RCA pin cord. For details, see the “Using the Speaker Input” sec-
tion.
