CONNECTIONS & CONTROLS
FRONT PANEL
1 FRONT RCA INPUTS L/R-CH
Low-level stereo RCA inputs for connection with the front line-outs of the
head-unit
2 REAR RCA INPUTS L/R-CH
Low-level stereo RCA inputs for connection with the rear line-outs of the
head-unit (only for SPA4100Z)
3 INPUT GAIN CONTROL FRONT L/R-CH
Input gain control potentiometer for the FRONT L/R-CH amplifier section,
to match the output voltage of the headunit’s RCA line-outs to the amplifier
input
4 OPERATION MODE SWITCH FRONT L/R-CH
Slide switch to select the operation mode of the electronic crossover
driving the 3/4-CH channel section of the amplifier
5 HIGH-/LOWPASS FREQUENCY CONTROL FRONT L/R-CH
Control potentiometer for the highpass or lowpass crossover frequency
adjustment of the FRONT L/R-CH channel section
6 POWER/PROTECT LED
Green “operation” LED is lit when the amp is turned ON, signaling correct
operation. Red illuminated LED is signalling faulty speaker connections or
general malfunction of the amplifier
7 OPERATION MODE SWITCH REAR L/R-CH
Slide switch to select the operation mode of the electronic crossover
driving the 3/4-CH channel section of the amplifier
8 HIGH-/LOWPASS FREQUENCY CONTROL REAR L/R-CH
Control potentiometer for the highpass or lowpass crossover frequency
adjustment of the 1/2-CH channel section of the amplifier
9 INPUT GAIN CONTROL REAR L/R-CH
Input gain control potentiometer for REAR L/R-CH amplifier section, to
match the output voltage of the headunit’s RCA line-outs to the amplifier
input
To Next Page
