Bedienungsanleitung Crunch GTO1200 (Seite 10 von 32) (Deutsch, Englisch, Französisch, Italienisch, Spanisch)

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ENG

blue = speaker - right - positive

white = speaker - right - negative

orange = speaker - left - negative

yellow = speaker - left - positive

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 (SUBSONIC, Fig. 1, 7). Thus to that only the frequencies above the chosen crossover

frequency will be amplified and the subwoofer plays more precised and efficient.

VARIABLE SUBSONIC FILTER

SUBWOOFER CONNECTIONS

- The total loudspeaker impedance must not be lower than 1 ohm.

- Never connect loudspeaker cables with the ground of the chassis or the +12 V supply voltage.

- If the amplifier is operated with a too low impedance or incorrectly used, the entire sound system

may be damaged. This means a warranty void in such cases.

OPERATING ELEMENTS

Turn the input level control (INPUT LEVEL, Fig. 1, 3) on the amplifier to the MIN. position. Turn then

the volume control of the headunit to 80% - 90% of its maximum volume. Now turn slowly the input

level control on the amplifier (INPUT LEVEL, Fig. 1, 3) in a clockwise direction until you hear some

distortion, then turn back slightly until the distortion is not audible anymore.

INPUT SENSITIVITY

The HIGH LEVEL INPUT (Fig. 1, 2) is suitable to connect the amplifier inputs with speaker wires, if

your headunit is not equipped with pre-amplifier RCA outputs. Extend therefore 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.

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).

HIGH LEVEL INPUT

The amplifier detects a voltage rise (6 Volts) with a so called ”DC Offset” over the connected input

signal on the HIGH LEVEL INPUT (Fig. 1, 2) when the headunit will be switched on. Hence, the amplifier

will also be turned on. As soon as the headunit will be turned off, the amplifier turns also automatically

off. In this case the turn-on connection (REM, Fig. 2, 2) is not needed.

Note: The Auto Turn On function usually works with 90% of all headunits, because they are equipped

with ”High Power”-outputs. Only with a few older and still existing headunits the Auto Turn On function

is not working.

AUTO TURN ON

Set the desired cross-over frequency by using the controller (LPF, Fig. 1, 8). Thus to that only the

frequencies below the chosen cross-over frequency will be amplified and the subwoofer plays more

precised and efficient.

VARIABLE LOWPASS FILTER

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