Crunch GPX1250.1D Bedienungsanleitung Seite 10

HIGH LEVEL INPUTS & AUTO TURN ON
The high level inputs under HI LEVEL INPUT (Fig. 5) are suitable to connect the device input with speaker
wires, if your head unit is not equipped with pre-amplifier RCA outputs. Extend therefor every regarding speak-
er cable from your head unit 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 HI
LEVEL INPUT connector.
CAUTION: Never use the high level inputs and the RCA inputs at the same time. This may damage the
device seriously.
The amplifier detects a voltage rise (6 Volts) with a so called "DC Offset" over the connected input signal on the
high level inputs under HI LEVEL INPUT (Fig. 5) when the head unit will be switched on. Hence, the amplifier
will also be turned on. As soon as the head unit 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 head units, because they are equipped with
"High Power"-outputs. Only with a few older and head units the Auto Turn On function is not working.
INPUT SENSITIVITY
Turn the LEVEL INPUT (Fig. 1,7) controller of the amplifier to the MIN position. Then turn the volume controller
of the head unit to 80 - 90% of its full setting. Now turn LEVEL INPUT clockwise until you hear some distortion.
Then turn back the LEVEL INPUT slightly until you hear a cleaner sound.
VARIABLE SUBSONIC FILTER
With the SUB SONIC controller (Fig. 1,5) you can adjust the lower crossover frequency, to filter the very low
frequencies to relieve the subwoofer or to generate a bandpass signal. If you don't want to use this function,
turn the controller (Fig. 1,5) to the very left to the 10 Hz position.
VARIABLE LOW PASS FILTER
Set the desired crossover frequency by using the controller LOW PASS (Fig. 1,4). Thus to that only the fre-
quencies below the chosen crossover frequency will be amplified and the subwoofer plays more precisely and
efficient.
VARIABLE BASS BOOST
By using the BASS BOOST controller (Fig. 1,3) you are able to increase the bass enhancement from 0 to 12
dB. ATTENTION: Use the BASS BOOST wisely!
PHASE SHIFT CONTROLLER
The PHASE SHIFT controller (Fig. 1,6) allows to adjust the phase between 0° and 180° to match the output
signal with the vehicle's interior acoustic.
BASS LEVEL REMOTE CONTROLLER
With the included bass level cable remote controller you are able to adjust the bass level e.g. out of the driver's
seat. Connect the remote controller and the REMOTE connector (Fig. 1,2) with the enclosed cable.
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