14
CONNECTIONS & CONTROLS
FRONT PANEL
1 RCA INPUTS 1/2-CH
Low-level stereo RCA inputs for connection with the line-outs of the head-unit
2 RCA INPUTS 3/4-CH
Low-level stereo RCA inputs for connection with the line-outs of the head-unit (only
for SPA2200)
3 INPUT GAIN CONTROL 1/2-CH
Input gain control potentiometer for 1/2-CH amplifier section, to match the output
voltage of the head-unit's RCA line-outs to the amplifier input section
4 HIGH PASS FREQUENCY CONTROL 1/2-CH
Control potentiometer for the highpass crossover frequency adjustment of the 1/2-
CH channel section of the amplifier
5 OPERATION MODE SWITCH 1/2-CH
Slide switch to select the operation mode of the electronic crossover driving 1/2-
CH channel section of the amplifier
6 LOW PASS FREQUENCY CONTROL 1/2-CH
Control potentiometer for the lowpass crossover frequency adjustment of the 1/2-
CH channel section of the amplifier
7 INPUT SELECTOR SWITCH
Slide switch to select either a 2-channel or a 4-channel RCA input signal, to drive
the SPA4200. This switch must be set to its 2-CH position if the amp shall be dri-
ven by one stereo RCA interconnect only, and set to 4-CH when driven by two ste-
reo RCA interconnects respectively
8 INPUT GAIN CONTROL 3/4-CH
Input gain control potentiometer for 3/4-CH amplifier section, to match the output
voltage of the head-unit's RCA line-outs to the amplifier input section
9 HIGH PASS FREQUENCY CONTROL 3/4-CH
Control potentiometer for the highpass crossover frequency adjustment of the 3/4-
CH channel section of the amplifier
10 OPERATION MODE SWITCH 3/4-CH
Slide switch to select the operation mode of the electronic crossover driving the
3/4-CH channel section of the amplifier
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