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AMPLIFIER FEATURE DESCRIPTIONS
GROUND POUNDER GPV AMPLIFIERS:
A POWER LED indicates the powered up and turned on condition.
Each model is capable of 4 & 2-Ohms stereo per channel, or 4-Ohms mono bridged operation
!
!
All Crunch amplifiers feature a comprehensive diagnostic system, with speaker lead short circuit,
except the mono amps which are capable of 4, 2 and 1-Ohm loads.
!
and amplifier DC faults indicated by the red “PROTECT” LED.
! Tri-Mode operation with any stereo pair of amplifier channels is possible, as with all bridgeable
CAUTION: DO NOT OPERATE ANY AMPLIFIER BELOW THE INTENDED IMPEDANCE. YOU
amplifiers.
!
! The input sensitivities for rated output powers are variable from 0.2 volts to 5 volts on multi channel
WILL CAUSE DAMAGE TO THE AMPLIFIER THAT WILL NOT BE COVERED UNDER THE
models and 0.2 volts to 6-9 volts on mono models.
WARRANTY PRINTED IN THE BACK OF THE MANUAL. 2 & 4 Channel amps are capable of 4
! All crossovers are fully variable in their respective ranges.
and 2-Ohms wired stereo and 4-Ohms wired mono bridged. The mono amps are capable of 4, 2
! Crossover filters are 12dB/Octave.
and 1-Ohm.
2
The X-OVER slide switch selects the internal crossover functions:
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting
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 5V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from one signal.
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.
GPV700.2 / GPV1000.2 2-CHANNEL AMPLIFIERS
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 switch which allows you to select 2, 3 or 4 channel
operation.
The X-OVER slide switch selects the internal crossover functions:
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting
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 5V.
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy
chain multiple amplifiers from one signal.
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.
GPV1000.4 / GPV1600.4 4-CHANNEL AMPLIFIERS
-The LINE INPUT signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER
setting simplifying daisy chaining of amplifiers.
-SUBSONIC: Allows you to adjust the crossover filter from 15Hz to 35Hz.
-LPF: Allows yo to adjust the LOW PASS crossover filter from 35Hz to 250Hz.
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.
The mono amps are capable of 4, 2 & 1-Ohm loads.
Operating the amp below 1-Ohm can cause damage to the
amp not covered in the warranty.
GPV2000.1 1-CHANNEL A/B CLASS MONO BLOCK AMPLIFIERS
LINE INPUT: Accepts unbalanced RCA inputs from 0.2 volts to 9 volts.
LINE OUTPUT: The unbalanced RCA outputs are set the same as the CROSSOVER switch on the
side mount control.
BALANCED INPUT: Accepts balanced line inputs from 0.4 volts to 12 volts for the optional MMBLD-
1 balanced line driver.
LEVEL: The input level control allows you to match the amplifier input sensitivity to the output level of
the RADIO/CD source from 0.2 volts to 9 volts when using unbalanced (RCA) and 0.2 volts to 18
volts with the balanced input.
PHASE: The Phase shift is fully adjustable from 0 to 180 degrees.
REMOTE: This is the input jack for the remote Level control.
BASS EQ: The Bass Boost is fully adjustable from 0 to 10db at 45Hz.
SUBSONIC: The variable Subsonic filter is fully adjustable from 15Hz to 35Hz.
LOWPASS: The built-in low pass frequencies are fully variable from 35 to 250Hz.
POWER: Indicates that the amp has power, ground and remote turn-on input via a green L.E.D.
PROTECT: Indicates that the amplifier has detected a fault and will not operate. There are several
possible problems that can cause the amplifier to go into the protect mode. See the trouble
shooting guide in the back of the manual for details.
The mono amps are capable of 4, 2 & 1-Ohm loads.
Operating the amp below 1-Ohm can cause damage to the
amp not covered in the warranty.
GPV3000.1D PRO 1-CHANNEL D-CLASS MONO AMPLIFIERS
+ - gnd - +
HI INPUT
5V 0.2V 0dB 9dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF MONO STEREO
X-OVER MODE
LINE OUT LINE INPUT
L
L
R
R
LINE INPUT
LINE OUT
R
L
CH3/4 CH1/2
CH3 CH4
CH1 CH2
CHANNEL 1 / 2
CHANNEL 3 / 4
+ - gnd - +
+ - gnd - +
HI INPUT
5V 0.2V 0dB 9dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF
X-OVER
5V 0.2V 0dB 9dB 60Hz 1.2KHz 30Hz 250Hz
LEVEL BASS EQ HPF LPF
FULL LPF HPF
X-OVER
CHANNEL
2 3 4
MODE
L
R
L
R
9V 0.2V 0 180 0dB 10dB 15 35Hz 35 250Hz PRO
INPUT OUTPUT BALANCED LEVEL PHASE REMOTE BASS EQ SUBSONIC LOW PASS PWR
INPUT
OUTPUT
MASTER
INPUT
SLAVE
IN
OUT
FLASH
NO FLASH
FLASH
NO FLASH
L
R
L
R
POWER
PROTECT
REMOTE
0dB 9dB
BASS
BOOST
15Hz 55Hz
SUB
SONIC
40Hz 150Hz
LOW
PASS
6V 0.2V
LEVEL
INPUT
OUTPUT
FLASH
NO FLASH