Rainbow Germanium Four Einbauanleitung Seite 37

Operation Mode: Bandpass REAR
This mode of operation is used only when the amplifier is intended for mid-range use, as an amplifier for additional
kick-bass in the door or kick panel (see brochure „KickBass Forever"), or in subwoofer mode as low-pass with
subsonic.
• Set switch „X-OVER" (10) to „BP/LPF" and cut off frequency of the highpass (frequency from which the
loudspeaker should play) „HPF" (18) to between 15 Hz – 500 Hz for the REAR channels by means of a
potentiometer.
• Set low-pass cut off frequency (frequency at which the loudspeaker should no longer play) by means of a
potentiometer „LPF" (17) to between 50 Hz – 5 kHz for the REAR channels.
Loudspeaker Connection: Stereo
The loudspeaker systems are attached at the connecting terminals "FRONT" (9) and REAR (8), which are clearly
marked by + L - and + R -. It is imperative that protective sleeves be provided at cable ends. The use of cables with
a minimum diameter of 4 mm
favorable amplifier damping factor remains relatively constant over the entire frequency range.
During connection of the loudspeaker crossovers to the amplifier, it is imperative to pay close attention to like
polarity/phase balance. Switching the polarity/phase balance results in the stereo basis and bass rendition being lost
through phase cancellation (Fig. 7).
Caution: The loudspeaker connections must not come into contact with the autobody. The negative connections
on the left and right must not be connected with one another. Neglecting to follow these precautions
can lead to damage of the amplifier.
Front-System:
Connect left channel (+) of the loudspeaker/crossover with clamp "FRONT" +FL (9).
Connect left channel (–) of the loudspeaker/crossover with clamp "FRONT" FL – (9).
Connect right channel (+) of the loudspeaker/crossover with clamp "FRONT" +FR (9).
Connect right channel (–) of the loudspeaker/crossover with clamp "FRONT" FR– (9).
Rear-System:
Connect left channel (+) of the loudspeaker/crossover with clamp "REAR" +RL (8).
Connect left channel (–) of the loudspeaker/crossover with clamp "REAR" RL – (8).
Connect right channel (+) of the loudspeaker/crossover with clamp "REAR" +RR (8).
Connect right channel (–) of the loudspeaker/crossover with clamp "REAR" RR– (8).
2
ensures the necessary low impedance with the smallest voltage drop and that a
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Germanium Four