Control
Setting
Mode / Function
F
ront / Sub
w
oof
er
Input
Voltage
Low
RCA/Preamp Level Range (250 mV - 4 V)
High
RCA/Preamp or Speaker Level R
ange (580 mV - 14 V)
Input
Sens.
Variable
Adjusts the input stage of each pair of amplifier channels to
match the source unit’s output voltage for maximum clean
output (refer to Appendix A)
F
ront
Input
Mode
2CH
Applies two channels of input to all three
amplifier channels. Main input signals will be
combined to mono for the subwoofer channel.
Use Front
Inputs Only
4CH
Sends four discrete channels to all four inputs.
L & R Sub Inputs will be combined to mono.
If only one channel of subwoofer signal is
available, we recommend using a Y-adaptor to
feed both Sub Inputs.
Use Front
and Sub
Inputs
Filter
Freq. (Hz)
Variable
Adjusts the high-pass filter cutoff frequency, variable from
35-300 Hz, 12 dB/Octave
Sub
w
oof
er
Output
Polarity
0
Normal speaker polarity
180 deg.
Polarity reversed 180 degrees
Infrasonic
Filter (Hz)
Variable
Adjusts the high-pass filter cutoff frequency, variable from
20-40 Hz, 12 dB/Octave
LP Filter
Freq. (Hz)
Variable
Adjusts the low-pass filter cutoff frequency, variable from
40-400 Hz, 24 dB/Octave
Bass
Boost (dB)
Variable
Boost-Only Bass Equalizer: Boost range from 0dB (full-
counterclockwise) to + 12dB (full-clockwise), centered
at 43 Hz.
Control Panel Settings and Adjustments
The amplifier’s settings and controls are located on the bottom panel beneath a
gasketed, protective cover. Remove the four Phillips head screws from the center
panel to access the controls and make adjustments. Replace cover when finished
and mount the amplifier.