Operation Manual

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8 
Crossover frequency control allowing the setting of the subsonic cut-in
frequency between 20 and 50 Hz.
9 
Depending on the selected switch setting the amplifier operates in
Fullrange or Lowpass mode.
bl 
Crossover filter frequency control allowing the setting of the lowpass
cut-off frequency between 40 and 240 Hz.
Note: This control is not active when the amplification mode switch is
in the ''Fullrange'' position!
bm 
Input gain/sensitivity control allowing the matching of the amplifier
input section to the head-unit (pre-out) output voltage.
bn 
Input for RJ11 jack, for the external bass level remote control.
bo 
Low-level RCA signal output to feed signal to further amplifiers.
bp 
Low-level RCA signal input for connection to head-unit pre-out.
1 
Power connection terminal to chassis ground or negative
terminal of car battery (-12 V)
2 
Remote switiching contact for the automatic (remote) turn-on / turn-
off of the power amplifier from the head-unit's remote (or antenna
control) lead.
3 
Power connection terminal to positive terminal of car battery.
4 
Fuses for protection of the amplifier-internal electronics against
overload or faulty operation / wrong manipulation.
5 A A
Speaker output terminals for one or two subwoofers.

6 
Amplifier status-LED. Lit green when power is on.
7 
Lit red when amplifier is in protect mode due to shorted speakers,
overtemperature etc.
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