Operating Elements; Protection Circuit - Crunch GROUNDPOUNDER GPX2000.5 Manual De Uso

AUDIO SIGNAL CABLES
When installing the audio cables between the RCA outputs of the head unit and the RCA inputs of the amplifier,
the audio and power supply cables should, if possible, not be routed along the same side of the vehicle. We
recommend a separated installation, e.g. routing the power cable through the cable channel on the left side
and the audio cables through the cable channel of the vehicle on the right side or vice versa. This prevents
interferences due to crosstalk into the audio signal.

OPERATING ELEMENTS

INPUT SENSITIVITY (FRONT, REAR & SUB)
Turn the GAIN (Fig. 1.3, 1.6 or 1.16) controller of the amplifier to the MIN position. Then turn the volume control-
ler of the head unit to 80 - 90% of its full setting. Now turn GAIN clockwise until you hear some distortion. Then
turn back the GAIN slightly until you hear a cleaner sound.
VARIABLE HIGH PASS FILTER (FRONT & REAR)
Set the desired crossover frequency on the HPF controller (Fig. 1.3 or 1.8). Thus to that only the frequencies
above the chosen crossover frequency will be amplified. This effectively minimizes distortions and overloads
at lower frequencies. A good point to start is at 125 Hz.
VARIABLE LOW PASS FILTER (SUB)
Set the desired crossover frequency by using the controller (Fig. 1.14). Thus to that only the frequencies below
the chosen crossover frequency will be amplified and the subwoofer plays more precise and efficient. A good
point to start is at 125 Hz.
VARIABLE BASS BOOST (SUB)
With the controller BASS BOOST (Fig. 1.13) you are able to adjust the bass level from 0 - 12 dB. Use the
controller EQ (Fig. 1.12) to set the frequency of the boost between 40 and 60 Hz.
Attention: Use the controller BASS BOOST wisely!
VARIABLE SUBSONIC FILTER (SUB)
With the SUBSONIC controller (Fig. 1.15) 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. 1.15) to the very left to the 10 Hz position.
NOTE: The adjusted value of the SUBSONIC (Fig. 1.15) should not be higher than the adjusted value of the
LPF controller (Fig. 1.14). Otherwise no sound will be audible.
BASS LEVEL REMOTE CONTROLLER (SUB)
With the included bass level cable remote controller (Fig. 1.17) you are able to adjust the bass level e.g. out
of the driver's seat.

PROTECTION CIRCUIT

The POWER LED (Fig. 1.9) lights up green, if the amplifier is in operation.
The PROTECTION LED (Fig. 1.9) lights up red, when 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.
10