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Controls
A. Front and Rear HPF/FULL Electronic Filter
These switches activate the built-in electronic filter. When set to HPF
(High Pass Filter), the filter limits bass frequencies, sending only those
frequencies above 100Hz to the speakers. This is useful in a system in
which a separate subwoofer is used to reproduce bass frequencies. When
set to FULL the full spectrum of music is sent to the connected speakers.
B. Front and Rear Gain Control
This control is used to match the input sensitivity of the amplifier to the
radio. The Gain Control is not a volume control. Use the source unit to
control system volume. Use these steps to set the Gain Control:
1. 1. Set the Gain Control to minimum by turning the Gain Control knobs
completely counter clockwise.
2. 2. On the radio, set the Bass and Treble to zero, and adjust the volume
to approximately 2/3 of maximum.
3. 3. Slowly increase the amplifier’s Front Gain Control clockwise by
turning the knob until the sound has just begun to distort. Then turn
the Front Gain Control counterclockwise slightly to cut distortion.
Repeat this process for the Rear Gain Control. This will allow the
amplifier to operate at maximum efficiency.
Failure to follow these steps could result in damaged speakers and/
or amplifier.
C. Power
When the power is on, the LED indicator will illuminate in blue.
Input Side (from radio)
MAX
HPF FULL
GAIN
MINMAXMIN
GAIN
HPF FULL
X-OVER
FRONT REAR
Output Side (to speakers)
POWER
QUAD4
AB B C