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AMPLIFIER FEATURE DESCRIPTIONS
GROUND POUNDER GPA AMPLIFIERS:
Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged operation except
the mono amps which are capable of 4, 2 and 1-Ohm loads.
The input sensitivities for rated output powers are variable from 0.2 volts to 5 volts on multi channel
models and 0.2 volts to 6-9 volts on mono models.
!
All crossovers are fully variable in their respective ranges
Crossover filters are 12dB/Octave.
A
POWER
LED indicates the powered up and turned on condition
The
X-OVER
slide switch selects the internal crossover functions:
-The input signal is routed directly to the
LINE OUT
simplifying daisy chaining of amplifiers.
-HPF:
Selects the built in
HIGH PASS
filter, variable from 60 Hz to 1.2kHz.
-FULL:
Bypasses all crossovers for full frequency range operation.
-LPF:
Selects the built in
LOW PASS
, variable from 30 Hz to 250Hz.
MODE
: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO
for bridging operation
HIGH INPUT
: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the
HIGH level (wire) inputs.
LINE INPUT
: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.
LINE OUTPUT
: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from one signal.
The 4 channel amps have the same features as the 2 channel models accept that there are 2 sets of
controls.
1 set for channels 1 & 2 and 1 set for channels 3 & 4.
In addition, the 4 channel models have a
Mode
operation.
The
X-OVER
slide switch selects the internal crossover functions:
-The input signal is routed directly to the
LINE OUT
simplifying daisy chaining of amplifiers.
-HPF:
Selects the built in
HIGH PASS
filter, variable from 60 Hz to 1.2kHz.
-FULL:
Bypasses all crossovers for full frequency range operation.
-LPF:
Selects the built in
LOW PASS
, variable from 30 Hz to 250Hz.
MODE
: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO
for bridging operation
HIGH INPUT
: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the
HIGH level (wire) inputs.
LINE INPUT
: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.
LINE OUTPUT
: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from one signal.
-The
LINE INPUT
signal is routed directly to the
setting simplifying daisy chaining of amplifiers.
-SUBSONIC:
Allows you to adjust the crossover filter from 15Hz to 55Hz.
-LPF:
Allows yo to adjust the
LOW PASS
crossover filter from 40Hz to 150Hz.
LEVEL:
Adjusts the input sensitivity from 0.2 volts to 6 volts.
BASS EQ:
The Bass EQ is adjustable from 0db to 9dB.
REMOTE:
This is the input jack for the remote Level control.
LINE INPUT
: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.
LINE OUTPUT
: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from one signal.
2
RCA jacks, regardless of the
X-OVER
switch which allows you to select 2, 3 or 4 channel
RCA jacks, regardless of the
X-OVER
LINE OUT
RCA jacks, regardless of the
X-OVER
All Crunch amplifiers feature a comprehensive diagnostic system, with speaker lead short circuit, and
amplifier DC faults indicated by the red "
CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED IMPEDANCE. YOU
WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE COVERED UNDER THE
WARRANTY PRINTED IN THE BACK OF THE MANUAL. 2 & 4 Channel amps are capable of 4
and 2-Ohms wired stereo and 4-Ohms wired mono bridged. Some mono amps are capable of 4,
2 and 1-Ohm and others are only 4 & 2-Ohm capable. Please review the specifications page
carefully to determine the impedance capability of your chosen amplifier.
GPA700.2 / GPA1100.2 / GPA1800.2 2-CHANNEL AMPLIFIERS
setting
Note that the LOW PASS signal is MONO.
-In the LPF position, the HIGH PASS filter acts as a subsonic
filter.
-When the LPF mode is selected, a 0 to +9dB, at 45Hz, BASS -
EQ is also switched in.
GPA1000.4 / GPA1500.4 / GPA2000.4 4-CHANNEL AMPLIFIERS
setting
Note that the LOW PASS signal is MONO.
-In the LPF position, the HIGH PASS filter acts as a subsonic
filter.
-When the LPF mode is selected, a 0 to +9dB, at 45Hz, BASS -
EQ is also switched in.
GPA1000.1 / GPA1500.1 / GPA2000.1 / GPA3000.1 1-CHANNEL MONO AMPLIFIERS
The GPA1000.1 & GPA1500.1 mono amps are capable of 4 &
2-Ohm loads only (WARNING: they are not capable of 1-
Ohm).
The GPA2000.1 & GPA3000.1 are capable of 4, 2 & 1-Ohm
loads.
Operating the amp below the specified impedance capability
can cause damage to the amp not covered in the warranty.
PROTECT"
LED.
CAUTION
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