Crunch GTi4100 Mode D'emploi page 10

SIGNAL OUTPUTS TO CONNECT ADDITIONAL AMPLIFIERS
The input signal on the INPUT jacks (Fig. 1,10) will be routed in stereo to the output jacks OUTPUT
(Fig. 1, 9). Thus the OUTPUT jack allows the connection of an additional amplifier.
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. 1,8 or 11) until you have an average
medium level. This setting usually provides sufficient power reserves at optimum signal-to-noise ratio.
VARIABLE HIGHPASS FILTER
If the amplifier is to be used for mid-range/tweeter loudspeakers, set the switch (Fig. 1, 2 or 17) to "HP".
Set the desired cross-over frequency on controller (Fig.1, 6 or 13). Thus to that only the frequencies
above the chosen cross-over frequency will be amplified. This effectively minimizes distortions and
overloads at lower frequencies. A good point to start is at 125 Hz. For bigger loudspeakers (>20 cm)
set the switch (Fig. 1, 2 or 17) to "FULL". In this configuration the high pass controller is without function.
VARIABLE LOWPASS FILTER
If the amplifier is used to drive a subwoofer, set the switch (Fig. 1, 2 or 17) to "LP". Set the desired
cross-over frequency by using the controller (Fig. 1, 4 or 15). Thus to that only the frequencies below
the chosen cross-over frequency will be amplified and the subwoofer plays more accurate and efficient.
VARIABLE BASS BOOST
With the bass boost controller (Fig.1, 1 or 16) you are able to adjust the bass level from 0 - 12 dB at 45
Hz.
INPUT SELECTOR
With the INPUT SELECTOR (Fig.1, 7) you are able to set, if the amplifier should run with 2 x stereo
RCA signal inputs (4CH) or with only a stereo RCA signal input (2CH), if your headunit is only equipped
with 1 pair RCA signal outputs.
HIGH LEVEL INPUT
The High Level Input is suitable to connect the amplifier inputs with speaker wires, if your headunit is
not equipped with pre-amplifier RCA outputs. Extend therefor every regarding speaker cable from your
headunit with appropriate speaker cables from your car audio retailer to the mounting location of the
amplifier. Then connect the each matching loudspeaker cable with the cables of the included HIGH
LEVEL INPUT jack like described below. Please ensure that a ground cable (black cable, GND) for
each HIGH LEVEL INPUT connector must be connected, which you can branch from the ground terminal
of the amplifier (GND).
NOTE: Never use the High Level Input and the RCA inputs at the same time. This may damage the
amplifier seriously. The loudspeaker cables of the HIGH LEVEL INPUT must have no contact to the
ground (GND) by any means.
ENG
+
grey = speaker - right - positive
-
brown = speaker - right - negative
black = ground connection (GND)
-
white = speaker - left - negative
+
green = speaker - left - positive
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