Crunch G PX2200.1D Mode D'emploi page 10

OPERATING ELEMENTS
INPUT SENSITIVITY
The input sensitivity can be adjusted to any headunit. Turn the volume control of your headunit to the
center medium position and then adjust the input level controls (Fig. 1,3) until you have an average
medium level. This setting usually provides sufficient power reserves at optimum weighted noise voltage.
LOWPASS FILTER
Set the desired crossover frequency of the low pass filter by using the controller (Fig. 1, 5). Thus to
that only the frequencies below the chosen crossover frequency will be amplified and the subwoofer
plays more precised and efficient.
SUBSONIC FILTER
The subsonic filter is suited to filter the lower frequencies out from the audio signal to avoid unwanted
hum noises from the subwoofer. Set the desired crossover frequency of the subsonic filter by using
the controller (Fig. 1, 6). Thus to that only the frequencies above the chosen crossover frequency will
be amplified and the subwoofer plays more precised and efficient.
BASS BOOST
By using the bass boost controller (Fig.1, 4) you are able to increase the bass boost level from 0 dB to
18 dB.
Caution: Please use the bass boost with care. A too high bass boost may result in serious damages
on the subwoofer.
PHASE SHIFT
The controller (PHASE, Fig. 1, 7) allows to adjust the phase between 0° and 180° to match the run
time of the output signal with the vehicle's interior acoustic.
MASTER/SLAVE OPERATION
The Master/Slave Operation allows to link two identical GPX2200.1D amplifiers. You can connect
BRIDGE OUT (Fig.1. 1a) of amplifier 1 (Master) and BRIDGE IN (Fig. 1, 1b) of amplifier 2 (slave) with
each other via RCA cable.This means you can connect the in- and outputs of both amplifiers (Fig. 1,
1a and 1b) by a RCA patch cord. Amplifier 1 (Master) sends a summed mono signal to amplifier 2
(Slave). The advantage of this function is, that the crossover section of amplifier 2 will be bypassed
and for both amplifiers the same crossover settings come into operation, which can be adjusted on the
amplifier 1. Then both amplifiers work together as one big monoblock.
Please refer to section "MASTER/SLAVE OPERATION (Fig. 5) WITH 2 GPX2200.1D on page 12 and
the figure 5 on the very last page.
PROTECTION CIRCUIT
This LED (Fig. 2, 8) lits up in green, if the amplifier is in operation. If this LED lits up in red, the amplifier
is overheated, or a short circuit occurs resp. a too low impedance load is connected to the speaker
outputs. If this events, the internal built-in protection circuit shuts down the amplifier automatically. The
amplifier should work again properly after you have solved the problems.
ENG
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