Owner's Manual and Installation Guide 5/3 Channel Power Amplifiers 255, 355, 555

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KEY TO CALLOUTS
Power LED - Indicates amplifier power.
Subsonic / Hawkins Bass Control Switch - Select “SUB SONIC” to
engage the Sub Sonic filter at 13 Hz. Select “HAWKINS BASS CONTROL”
to engage the subwoofer channel’s high pass filter @I 45 Hz with +6 dB
boost for optimum bass.
Subwoofer Channel Input Select - Selectable inputs; “CH l-4” for non-
fading bass control, “CH 3&4” for front to rear fading bass control.
Channels 3&4 Input Select - Selectable inputs from internal (CH l&2)
or external (CH 38~4 local RCA inputs).
Amp Mode Switch (Channels 1-4) - Select “3CH” for bridged mono output
in 3 channel operation (use input channels 1 & 2). Select “5CH” for stereo
output in 5 channel operation.
Inputs - Right and left channel RCA inputs for channels 3&4.
Input Level - Channels 3&4 input level control.
ltiputs - Right and left channel RCA inputs for channels l&2.
Input Level - Channels l&2 input level control.
Sub Input Level - Subwoofer channel input level control.
Low Pass Filter Control Adjustment - (Subwoofer Channel) crossover
frequency control for the internal low pass filter.
Speaker Connection Terminal
- Speaker connections for CH l-4 &
Subwoofer Channel.
GND - Main ground connection.
Bolt to a clean chassis point in the ve-
hicle.
REMOTE - Remote turn-on input from the head unit. Accepts +12V.
+12V - Connected to a fuse or circuit breaker, then to the battery’s posi-
tive terminal.
Main Fuse - Main power supply fuse.