Maxxsonics Stereo Amplifier GPV11002 User Manual

AMPLIFIERS  
DRIVE  
GPV800.2 / GPV1100.2 / GPV3500.2  
GPV1200.4 / GPV1800.4 / GPV2400.4  
GPV2100.1  
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GENERAL INSTALLATION PROCEDURE  
System Design  
The success of any car stereo system relies on several factors, such as the system design, execution of the installation, and system setup. Please  
remember that any system is only as good as its weakest link.  
Please remember that higher power systems are not necessarily useful purely for high sound pressure levels, but also to establish a headroom capability, to  
reproduce musical peaks cleanly without distortion. Lower power amplifiers will clip earlier than their more powerful cousins, and cause loudspeaker failure when  
overdriven, due to the harmonics generated by a clipped signal, thus overheating voice coils.  
Amplifiers should be mounted with the fins running horizontally for best convection cooling, to minimize overheating. Purchase the best quality RCA cables you can  
afford, for reliability and less engine noise interference in the audio system.  
Installation  
WOOD  
DRIVE  
It is highly recommended that the amplifier be mounted to a board of MDF or other solid  
structure using the 4 mounting screws provided. Avoid mounting the  
amplifier to metal as this can introduce noise and other unwanted issues. When mounting  
the amplifier, ensure that it is mounted HORIZONTALLY, as shown in the diagram above, for  
optimal heat dissipation. Mounting amplifiers to speaker enclosures is not recommended as  
this can cause damage to the amplifier components. When choosing a location for  
mounting the amplifier, ensure that you check for clearance from wires, gas tank, electrical  
devices and brake lines etc.  
GROUND POUNDER  
GPV4500  
4000 WATTS  
General:  
Run the wiring so that RCA cables are at least 18“ away from power and speaker cables. Keep RCA cables away from electrical devices in the vehicle that can cause  
electrical noise, such as electric fuel pumps, emission control modules and other on-board electronic modules.  
Power and ground connections(see the features matrix on page 9 for proper gauge cables per amplifier):  
Use a sufficient gauge power cable and ground cable using the chart below as reference to what size wire you require. In a multi amplifier system, add the total value  
of the manufacture recommended fusing to get your total system amperage. Some applications may require multiple runs of power wire to meet the system  
requirements. In multi amplifier systems it is advisable to mount a large enough fuse right at the battery, and run one or multiple +12 volt power cables to a fused  
distribution block near the amplifiers. It is then a simple matter to connect the +12 volt terminal of each amplifier to the distribution block. During this process, please  
ensure that the main power fuse is removed to avoid shorting the electrical system. The main fuse must be within 12” of the vehicles battery.  
Ground each amplifier with as short a ground lead as possible directly to the vehicle chassis using 4 gauge wire or equivalent to the size of the amplifiers’ power wire.  
Use a ground distribution block, if you wish, but it is extremely important to keep the main ground lead from this distribution block to the chassis as short as possible ,  
not more than 12. The ground connection integrity to the chassis is very important, and the best way to achieve a good, solid electrical and mechanical contact is to  
use a large round crimp lug, crimped and soldered to the ground cable. The next step is to scrape the paint off the vehicle chassis , slightly larger than the ground  
lug, at the connection point. Drill a clearance hole in the chassis, the same size as the lug hole, and use a bolt, spring washer and nut to securely fasten the ground  
lug. Use petroleum jelly to coat the bolt/lug connection, to prevent oxidization with time.  
TIP: Use the same approach when installing head units, equalizers or any audio equipment for that matter - run short individual grounds from each piece directly to  
the vehicle chassis, to minimize ground loops and system noise. All power, ground and speaker connections should be crimped and soldered for reliability. Make sure  
that none of the cable insulation can chafe against exposed metal in the vehicle, causing short circuits to the chassis.  
WIRE LENGTH  
SYSTEM  
AMPERAGE  
7-10 ft.  
10-13 ft.  
13-16 ft.  
16-19 ft.  
19-22 ft.  
22-28 ft.  
NOTE: This Matrix is a general rule  
of thumb. Please refer to the  
manufacturers specific  
requirements. GPV specifications  
can be found on page 9.  
35-50  
8
6
4
4
4
2
6
4
4
2
2
0
4
4
2
2
0
0
4
4
2
2
0
0
4
4
2
2
0
0
4
2
0
0
0
0
50-65  
68-85  
85-105  
105-125  
125-150  
Safe connection sequence:  
After all cables are run, connect speaker wires to the speakers and amplifiers, then run and plug in RCA cables. Next, connect all power, ground, and remote turn on  
leads. Now connect all +12 volt cables to the amplifier/s and distribution blocks and fuse holders. Finally, connect the main +12 volt cable to the battery, with the main  
fuse removed, and we are almost ready to power up the system.  
Power up the system:  
The following procedure may seem like overkill, but there is nothing more frustrating when turning on a system for the first time, and it does not work properly  
immediately.  
First, make sure the head unit is off, and turn all level controls to minimum (counterclockwise), including the head unit volume control. Set all equalizers to 0 dB (no  
boost), and all crossover frequency controls at approximate frequencies, as recommended by the loudspeaker manufacturer. Set all input selector and crossover  
switches as required for the application. Remove all amplifier fuses, and insert the main fuse at the battery. If the fuse does not blow, you can insert the fuse in one of  
the amplifiers, and we are ready to turn on the system. Turn the head unit on, insert a CD, or select a radio station, and increase the head unit volume control. If the  
system sounds fine, turn off the head unit, and install fuses in the remaining amplifiers, one by one, till the complete system is powered up and functioning properly.  
1
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AMPLIFIER FEATURE DESCRIPTIONS  
GROUND POUNDER GPV 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.  
All Crunch amplifiers feature a comprehensive diagnostic system, with speaker lead short circuit, and  
amplifier DC faults indicated by the red PROTECT” LED.  
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 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  
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. The mono amps are capable of 4, 2  
and 1-Ohm.  
GPV800.2 / GPV1100.2 / GPV3500.2 2-CHANNEL AMPLIFIERS  
TheX-OVERslideswitchselects theinternalcrossoverfunctions:  
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting  
simplifyingdaisychainingofamplifiers.  
LINE OUT LINE INPUT  
X-OVER  
MODE  
LEVEL BASS EQ  
HPF  
LPF  
FLASH  
-HPF: Selects thebuiltinHIGH PASS filter,variablefrom60Hzto1.2kHz.  
-FULL: Bypasses allcrossovers forfullfrequencyrangeoperation.  
-LPF: Selects thebuiltinLOW PASS ,variablefrom30Hzto250Hz.  
MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO  
forbridgingoperation  
NO FLASH  
L
R
L
R
+ - gnd - +  
HI INPUT  
FULL LPF HPF MONO  
STEREO  
5V 0.2V  
0dB 9dB 60Hz 1.2KHz 30Hz 250Hz  
HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the  
HIGHlevel(wire)inputs.  
LINEINPUT:Thelineinputaccepts unbalanced(RCA)inputs from0.2Vto5V.  
LINE OUTPUT:The line output passes through signal from the line inputs which allows you to daisy  
chainmultipleamplifiers fromonesignal.  
Note that the LOW PASSsignal 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.  
GPV1200.4 / GPV1800.4 / GPV2400.4 4-CHANNEL AMPLIFIERS  
The 4 channel amps have the same features as the 2 channel models accept that there are 2 sets of  
controls.  
1setforchannels 1&2and1setforchannels 3&4.  
In addition, the 4 channel models have a Mode switch which allows you to select 2, 3 or 4 channel  
operation.  
TheX-OVERslideswitchselects theinternalcrossoverfunctions:  
-The input signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER setting  
simplifyingdaisychainingofamplifiers.  
CHANNEL 3 / 4  
LEVEL BASS EQ HPF  
LPF  
CH3 CH4  
- gnd -  
LINE OUT  
X-OVER  
MODE  
LINE INPUT  
R
L
+
+
2
3
CHANNEL  
4
FLASH  
5V 0.2V  
0dB 9dB 60Hz 1.2KHz 30Hz 250Hz  
FULL LPF HPF  
X-OVER  
HI INPUT  
- gnd -  
NO FLASH  
LEVEL BASS EQ HPF  
LPF  
+
+
CH3/4  
CH1/2  
CH1 CH2  
5V 0.2V  
0dB 9dB 60Hz 1.2KHz 30Hz 250Hz  
CHANNEL 1 / 2  
FULL LPF HPF  
-HPF: Selects thebuiltinHIGH PASS filter,variablefrom60Hzto1.2kHz.  
-FULL: Bypasses allcrossovers forfullfrequencyrangeoperation.  
-LPF: Selects thebuiltinLOW PASS ,variablefrom30Hzto250Hz.  
MODE: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO  
forbridgingoperation  
HIGH INPUT: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the  
HIGHlevel(wire)inputs.  
LINEINPUT:Thelineinputaccepts unbalanced(RCA)inputs from0.2Vto5V.  
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy  
chainmultipleamplifiers fromonesignal.  
Note that the LOW PASSsignal 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.  
-The LINE INPUT signal is routed directly to the LINE OUT RCA jacks, regardless of the X-OVER  
settingsimplifyingdaisychainingofamplifiers.  
GPV2100.1 1-CHANNEL A/B CLASS MONO BLOCK AMPLIFIERS  
-SUBSONIC:Allows youtoadjustthecrossoverfilterfrom15Hzto55Hz.  
-LPF:Allows yotoadjusttheLOW PASScrossoverfilterfrom40Hzto150Hz.  
LEVEL: Adjusts theinputsensitivityfrom0.2volts to6volts.  
BASSEQ: TheBass EQis adjustablefrom0dbto9dB.  
REMOTE:This is theinputjackfortheremoteLevelcontrol.  
LINEINPUT:Thelineinputaccepts unbalanced(RCA)inputs from0.2Vto6V.  
LINE OUTPUT: The line output passes through signal from the line inputs which allows you to daisy  
chainmultipleamplifiers fromonesignal.  
POWER  
LINE OUT LINE INPUT  
BASS BOOST SUBSONIC  
LOWPASS  
LEVEL  
FLASH  
L
L
R
NO FLASH  
PROTECT  
REMOTE  
CONTROL  
0dB  
9dB 15Hz 55Hz 40Hz 150Hz 6V  
0.2V  
R
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.  
2
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GPV800.2 / GPV1100.2 / GPV3500.2 2 CHANNEL AMPLIFIER APPLICATIONS  
FULL RANGE STEREO  
This is the most basic application for the GROUND POUNDER Series 2 channel  
amplifiers.  
3. Crossoverfrequency control checklist:  
N/Aforfullrangeoperation.  
4. Line Level:  
1. Interconnect cable checklist:  
ConnecttheLINEINPUTS totheRadio/CD withgoodqualityRCAcables.  
2. CrossoverSwitch:  
Refertothesection“Setting up systems after installation for best performance”.  
TheX-OVERswitchmustbeintheFULL position.  
TheMODE switchmustbeintheSTEREOposition.  
NOTE: Minimum final loudspeaker impedances:  
4 &-2-Ohms stereo mode or 4-Ohms mono mode  
FULL RANGE  
STEREO LINE INPUT  
FULL RANGE  
SPEAKERS  
DRIVE  
TO BATTERY + 12 volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
GROUND POUNDER  
FULL RANGE MONO  
This application illustrates the basic mono bridging method for all Crunch 2 channel  
amplifiers.  
Switch setting checklist:  
-TheX-OVER switchmustbeintheFULL position.  
-TheMODE switchmustbeintheMONO position.  
Interconnect cable checklist:  
A MONO signal source is required, such as would be available from the mono sub bass  
output of an active crossover, whether stand alone, or built into a head unit or equalizer.  
Important: Do not be tempted to connect the hot, or positive outputs, from any source  
together to obtain a mono signal, as this could very well damage the output stage of that  
source.  
Crossoverfrequency control setting checklist:  
N/Aforfullrangeoperation.  
TIP: If you are using the mono sub bass output of an active crossover, there is nothing  
wrongwithswitchinginthelowpass filterintheseamplifiers forasteeperlowpass roll-off.  
It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter RCA  
cable. Connect the mono speaker positive terminal to the LEFT +, and its negative  
terminaltoRIGHT-.  
Minimum final loudspeakerimpedance:  
- 4-Ohms mono.  
FULL RANGE  
MONO SPEAKER  
FULL RANGE  
MONO LINE INPUT  
DRIVE  
VIA Y-ADAPTER  
FROM MONO SOURCE  
TO BATTERY + 12 volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
GROUND POUNDER  
The HIGH LEVEL inputs are used when the radio/CD player does not have RCA cable outputs. You can connect the radio/CD player speaker wires directly  
to the amplifier via the high Level Inputs.  
Use both connectors for 4 CH amplifiers  
Use this connector for 2 CH amplifiers  
GRAY: CH 1 Speaker Input +  
BROWN: CH 1 Speaker input -  
Black: Chassis Ground  
ORANGE: CH 3 Speaker Input +  
PINK: CH 3 Speaker input -  
Black: Chassis Ground  
GREEN: CH 2 Speaker Input -  
White: CH 2 Speaker Input +  
BLUE: CH 4 Speaker Input -  
YELLOW: CH 4 Speaker Input +  
3
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GPV800.2 / GPV1100.2 / GPV3500.2 2-CHANNEL AMPLIFIER APPLICATIONS  
Stereo high pass with mono low-pass in a 2 way active, or bi-amplified system  
In this application we will use a 2 channel amplifier for the high frequencies, and a second  
one for the low frequencies, or mono sub bass. Please consult the speaker specifications  
todeterminemaximumamplifierpowerrequirements.  
Crossoverfrequency control checklist:  
Highs amplifier:  
- HI PASS:100 Hz  
- LOW PASS:N/A  
Interconnect cable checklist:  
Connect the inputs of the HIGHS amplifier to a Radio/CD with good quality RCA cables.  
Connect the LINE OUT of the HIGHS amplifier to the inputs of the BASS amplifier with a  
stereoRCAtoRCAcable.  
Lows amplifier:  
- HI PASS(Subsonic filter): 10 Hz to 40 Hz  
- LOW PASS:80 Hz  
Mono bass woofer wiring:  
Connect the mono speaker positive terminal to the RIGHT +, and its negative terminal to  
LEFT-.  
Please note that these frequency points are suggestions only. Refer to the loudspeaker  
manufacturer specifications and the section “Setting up systems after installation for best  
performance”  
Switch setting checklist:  
Level control checklist:  
-Refertothesection“Setting up systems after installation for best performance”  
- Highs amplifier: X-OVERswitchintheHPF position.  
MODE switchintheSTEREOposition.  
- Lows amplifier: X-OVERswitchintheLPF position.  
MODE switchintheMONO position.  
Minimum final loudspeakerimpedances:  
- 2-Ohms per channel stereo.  
- 4-Ohms mono bridged.  
FULL RANGE  
STEREO LINE INPUT  
FULL RANGE  
SPEAKERS  
DRIVE  
TO BATTERY + 12 volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
GROUND POUNDER  
STEREO  
INTERCONNECT  
RCA CABLE  
MONO BASS  
SPEAKER  
DRIVE  
TO BATTERY + 12 volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
GROUND POUNDER  
4
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GPV1200.4 / GPV1800.4 / GPV2400.4 4 CHANNEL AMPLIFIER APPLICATIONS  
4 CHANNEL FULL RANGE SYSTEM  
Here we show how to use the 4 channel amplifiers as straight forward discrete 4 channel  
fullrangeunits.  
Crossoverfrequency control checklist:  
Channels 1/2:  
- HI PASS:N/A  
Interconnect cable checklist:  
-Connectthefourinputs oftheamplifiertoaRadio/CDwithqualityRCAcables.  
- LOW PASS:N/A  
Channels 3/4:  
- HI PASS:N/A  
Switch setting checklist:  
- 1/2CHX-OVER: FULL  
- 3/4CHX-OVER: FULL  
-MODE: 4CHANNEL  
- LOW PASS:N/A  
Level control checklist:  
-Refertothesection“Setting up systems after installation for best performance”  
Minimum final loudspeakerimpedances:  
- 2-Ohms per channel.  
FULL RANGE  
SPEAKERS  
DRIVE  
FULL RANGE  
STEREO LINE  
INPUTS  
TO BATTERY + 12 Volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
FULL RANGE  
SPEAKERS  
GROUND POUNDER  
2 or 3 CHANNEL FULL RANGE SYSTEM  
Here we show how to use the 4 channel amplifiers as full range 2 or 3 channel units by  
taking advantage of the mono bridging capability of all Crunch amplifiers.  
Crossover frequency control checklist:  
Channels 1/2:  
- HI PASS: N/A  
The following example shows how to create a 3 channel system by mono bridging  
channel pair 3 / 4. In order to create a 2 channel system, simply follow the example to  
also mono bridge channel pair 1 / 2.  
- LOW PASS: N/A  
Channels 3/4:  
- HI PASS: N/A  
- LOW PASS: N/A  
Interconnect cable checklist:  
- Connect the inputs of channel pair 1/2 to a suitable stereo source, e.g. a head unit  
with good quality RCA cables.  
- A MONO signal source is required to bridge channel pair 3/4, such as would be  
available from the mono sub bass output of an active crossover, whether standalone,  
or built into a head unit or equalizer.  
TIP: If you are using the mono sub bass output of an active crossover, there is nothing  
wrong with switching in the low pass filter in these amplifiers for a steeper low pass  
rolloff.  
Important: Do not be tempted to connect the hot, or positive outputs, from any source  
together to obtain a mono signal, as this could very well damage the output stage of  
that source.  
Level control checklist:  
- Refer to the section “Setting up systems after installation for best performance”  
- It is necessary to feed the SAME signal to both left and right inputs via a Y-adapter  
RCA cable.  
- Connect the mono speaker positive terminal to the LEFT +, and its negative terminal  
to RIGHT - as shown.  
Switch setting checklist:  
Minimum final loudspeaker impedances:  
- 2-Ohms per channel in stereo mode.  
- 4-Ohms mono bridged.  
- 1/2CH X-OVER: FULL  
- 3/4CH X-OVER: FULL  
- MODE: 3 CHANNEL  
MONO  
OR SUB BASS  
SPEAKER  
1 STEREO  
1 MONO  
DRIVE  
FULL RANGE  
LINE INPUTS  
TO BATTERY + 12 Volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
FULL RANGE  
SPEAKERS  
GROUND POUNDER  
5
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GPV2100.1 A/B CLASS 1 CHANNEL AMPLIFIER APPLICATION  
Basic application  
These sub bass amplifiers can be used in any of the bi-amplification systems described in  
this manual,replacingthe2channelamplifiers as pertheillustrations.  
Crossoverfrequency control checklist:  
LOW PASS:40Hz to 150Hz  
SUBSONIC:15Hz to 55 Hz  
BASSEQ: 0 to +9dB  
Interconnect cable checklist:  
Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.  
ConnecttheLINEOUTtotheinputs ofthesystemhighs amplifier.  
Level control checklist:  
Refertothesection“Setting up systems after installation for best performance”  
Use at least #12 gauge speaker wiring. The amps have dual speaker terminals,  
simplifyingthehookupofmultiplespeakers  
Minimum final loudspeakerimpedance: 1-Ohm.  
MONO  
SUBWOOFER  
GPR-1  
DRIVE  
TO BATTERY + 12 Volts VIA FUSE  
REMOTE TURN-ON  
CHASSIS GROUND  
GROUND POUNDER  
DESIGNATED  
MONO OUTPUT  
FROM HEAD UNIT  
PARALLEL MONO  
SUBWOOFERS  
2-OHMS EACH MINIMUM  
FULL RANGE  
STEREO LINE INPUT  
Y-ADAPTOR  
NOT USED  
Note: You can use the Radio/CD designated mono line output or a full range stereo line output.  
For full range stereo line output, you will need an optional “Y-Adaptor” as shown.  
6
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7
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SETTING UP SYSTEMS AFTER INSTALLATION FOR BEST PERFORMANCE  
GPV800.2 / GPV1100.2 / GPV3500.2 / GPV1200.4 / GPV1800.4 / GPV2400.4  
General:  
At this point you are ready to get more specific on the settings for your amplifier.  
High Pass:  
-When in Hi Pass operation, this setting acts as a low frequency cut off for your system reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this  
point. The 12 oclock position is a great starting point. EXAMPLE: If you adjust the High Pass to 100Hz, the amplifier will not play frequencies below 100Hz but will play frequencies from  
100Hz to the chosen Low Pass frequency.  
-When in Low Pass/Bandpass operation, this setting acts as a low frequency cut off for your system reproduction aka Subsonic Filter. The point that you set it at cuts off any frequencies  
from reproduction beyond this point. The 12 oclock position is a great starting point. EXAMPLE: If you adjust the High Pass to 25Hz, the amplifier will not play frequencies below 25Hz  
but will play frequencies from 25Hz to the chosen Low Pass frequency.  
-When in Flat/Full operation, the High Pass crossover is bypassed.  
Bass EQ:  
This setting is a fixed bass boost at 45Hz that is variable from 0-9dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to  
your speakers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 oclock position unless listening at a low  
volume or a low recording quality as this can result in high distortion and possibly clipping.  
Low Pass:  
The Low Pass control acts as a ceiling and doesnt allow frequencies to the right of the desired setting to be reproduced. Turning the potentiometer all the way to the right is a great  
starting point. EXAMPLE: If you adjust the Low Pass to 120Hz, the amplifier will not play frequencies above 120Hz but will play frequencies from 120Hz to the chosen Hi Pass or  
Subsonic frequency.  
-When in Hi Pass operation, this setting is bypassed.  
Level Control Setup:  
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the  
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input  
sensitivities properly to the head unit output signal level.  
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.  
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.  
If you are not sure what the Radio output sensitivity is, follow these general guide lines:  
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the  
left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/speaker combo has reached its maxx  
output in this application.  
GPV2100.1  
General:  
At this point you are ready to get more specific on the settings for your amplifier.  
Subsonic:  
This setting acts as a low frequency cut off for your system bass reproduction. The point that you set it at cuts off any frequencies from reproduction beyond this point. The 12 oclock  
position is a great starting point. EXAMPLE: If you adjust the Subsonic to 25Hz, the amplifier will not play frequencies below 25Hz but will play frequencies from 25Hz to the chosen Low  
Pass frequency.  
Bass EQ:  
This setting is a fixed bass boost at 45Hz that is variable from 0-9dB. This feature provides impact to your bass, but if not adjusted correctly, it can be over used and cause damage to  
your subwoofers and amplifiers. It is best to slowly turn this setting clockwise until the desired punch is felt. It is not recommended to exceed the 12 oclock position unless listening at a  
low volume or a low recording quality as this can result in high distortion and possibly clipping.  
Low Pass:  
The Low Pass control acts as a ceiling and doesnt allow frequencies to the right of the desired setting to be reproduced. The 12 oclock position is a great starting point. EXAMPLE: If you  
adjust the Low Pass to 80Hz, the amplifier will not play frequencies above 80Hz but will play frequencies from 80Hz to the chosen Subsonic frequency.  
Level Control Setup:  
Ensure that the Level is turned completely to the left prior to turning the system on. Next you should insert a CD or cassette that you are familiar with to use as a reference, and turn the  
head unit volume control to about 80% of its full setting. The system sound level will of course be very low, and the following procedures will help you to match the amplifier input  
sensitivities properly to the head unit output signal level.  
It is important to match the amplifier LEVEL input sensitivity to the Radio/CD output sensitivity. This can be located in the Radio/CD manual.  
If the Radio/CD output sensitivity is 2 volts, then adjust the amplifier LEVEL input to 2 volts.  
If you are not sure what the Radio output sensitivity is, follow these general guide lines:  
Turn the level control up slowly, till you hear distortion, then back off a few degrees on the control. If at any point your amplifier goes into protection, you will need to turn the Level to the  
left a bit and then try again. If you reach a point where the output does not increase, stop turning the Level control to the right as the amplifier/subwoofer combo has reached its maxx  
output in this application.  
Sit back and enjoy the music!  
8
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TROUBLESHOOTING A SYSTEM  
The key to finding the problemin a misbehaving sound system is to isolate parts of that system in a logical fashion to track down the fault.  
Descriptionof the PROTECTsystem built into all GROUNDPOUNDERamplifiers  
The diagnostic system will shut down the amplifier, until reset by turning the head unit off, and back on. This state of affairs will be indicated by the front panel PROTECT  
LEDlightingupunderthefollowingconditions:  
1-Asortcircuitontheloudspeakerleads.  
2-Aninternalamplifierfaultthatcauses aDCoffsetontheloudspeakeroutput.  
Shouldtheamplifiergointoprotectmode,simplydisconnectallRCAandspeakerleads,whilekeeping+12volt,powergroundandremoteleads connected.  
1.Nowturntheamplifierbackon,andifthediagnosticLEDlights,theamplifierhas aninternalfault.  
2.Ifnot,plugtheRCAcables back,andresettheamplifier.Ifitgoes intodiagnosticnow,thefaultlies intheinput,eitherwithbadcables orsourceunit.  
3. If the amplifier seems fine with RCAcables plugged in, connect the speakers, one at a time, and if one of the speakers or its wiring is faulty, it will activate the diagnostic  
system.  
Amplifierheatsink overheating  
Theamplifiers willshutdownwhentheheatsinktemperaturereaches 80degrees centigrade,andturnbackononcetheunithas cooleddownbelowthatpoint.  
Causes of overheating:  
1-Inadequatecooling-relocateorremounttoprovidebetternaturalairflowoverthefins.  
2 - Driving high power levels into low impedances - back off on the volume control, and/or make sure you are not loading the amplifier with less than the recommended  
loudspeakerimpedance.  
Low output power  
1-Checkthatlevelcontrols havebeensetupproperly.  
2-Makesurethatthebatteryvoltage,as measuredattheamplifiers +12voltandgroundterminals,is 11volts ormore.  
3-Checkall+12voltandgroundconnections.  
Fuses blowing  
1-Theuseofloudspeakerimpedances belowtherecommendedminimums willdrawmorecurrent-check.  
2-Ashortonthemain+12voltcablefromthebatterytothevehiclechassis willcausethemainfusetoblow.  
3-Ifanamplifierfuseblows continually,withonly+12volt,groundandremoteleads connected,theamplifiermaybefaulty.  
System does not turn on  
1-Checkallfuses.  
2-Checkallconnections.  
3 - Measure the +12 volt and remote turn on voltages at the amplifier terminals. If these are non existent or low, take voltage measurements at fuse holders, distribution  
blocks,theheadunits +12voltandremoteleads tolocalize theproblem.  
Noise problems  
Systemnoisecanbedividedintotwocategories,hiss,andelectricalinterference.  
Hiss, or white noise  
1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section ”Setting up systems after  
installation for best performance”  
2-Anothermajorproblemthatcancauseexcessive hiss,is anoisyheadunit-unplugtheamplifierinputRCAcables,andifthehiss levelreduces,thesourceunitis atfault.  
Electricalinterference  
The inside ofanautomobile is a veryhostile electricalenvironment.The multitude ofelectricalsystems, suchas the ignitionsystem, alternator, fuelpumps, airconditioners,  
tomentionjusta few, create radiatedelectricalfields, as wellas noise onthe +12voltsupplyandground. Remembertoisolate the problem-firstunplugamplifierinputRCA  
cables,ifthenoiseis stillpresent,checkthespeakerleads,ifnot,plugtheRCA’s back,andinvestigatethesourcedrivingtheamplifier,onecomponentatatime.  
Aticking or whine that changes with engine RPM:  
1-This problemcouldbecausedbyradiationpickupofRCAcables tooneartoafuelpumporadistributor,forinstance,-relocatecables.  
2-Checkthattheheadunitgroundis connectedstraighttothevehiclechassis,anddoes notusefactorywiringforground.  
3-Trytosupplytheheadunitwithaclean+12voltsupplydirectlyfromthebattery+,insteadofusingasupplyfromtheindashwiring/fusebox.  
Aconstant whine:  
This typeofnoisecanbemoredifficulttopinpoint,butis usuallycausedbysomekindofinstability,causingoscillations inthesystem.  
1-Checkallconnections,especiallyforgoodgrounds.  
2-Makesurethatnospeakerleads areshortingtoexposedmetalonthevehiclechassis.  
3-RCAcables arenotorious fortheirproblematicnature,socheckthatthesearegood,inparticulartheshieldconnections.  
9
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CRUNCH  
Maxxsonics Limited Warranty  
As the manufacturer of Maxxsonics, Autotek, Crunch, MB Quart and Hifonics car audio products,  
Maxxsonics USA Inc. Warrants to the original consumer purchaser the amplifier to be free from  
defects in material and workmanship for one (1) Year from date of purchase.  
All other parts and accessories of the system are warrantied to be free from defects in  
material and workmanship for one (1) year from date of purchase. Maxxsonics will  
repair or replace at it’s option and free of charge during the warranty period, any system  
component that proves defective in materials and workmanship under normal installation,  
use and service provided that the product is returned to the authorized Maxxsonics dealer  
from where it was purchased. A photo copy of the original receipt must accompany the  
product being returned.  
Valid purchase receipts will contain the name and address of the authorized reseller.  
Any damage to the product as a result of misuse, abuse, accident, incorrect wiring,  
improper installation, alteration of date code or bar code labels, revolution, natural  
disaster, or any sneaky stuff because someone messed up, repair or alteration out side  
of our factory or authorized service centers and any thing else you have done that you  
should not have done is not covered.  
This warranty is limited to defective parts and specifically excludes any incidental  
or consequential damages connected therewith. This warranty is not to be construed  
as an insurance policy.  
Warranty on installation labor, removal, re-installation and freight charges are not the  
responsibility of Maxxsonics USA Inc.  
Warranty products damaged as a result of insufficient or improper packing materials  
are not covered by this limited warranty and such damaged product will be returned  
“as is” at the expense of the owner.  
For information regarding Maxxsonics  
Extended Limited Warranty Program,  
10  
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OEM Integration  
Accessories  
MX-1 Premium High To Low Level Converter  
MX-3 Bass Controller  
* Converts High Level OEM speaker wires to Ultra Clean RCA  
Low Level Outputs  
* High Level Inputs: Accepts all types of High level Inputs  
including floating ground and high voltages up to 30 volts.  
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects  
music signals from the OEM wires and activates the MX-1. As  
an option, the module also offers a remote turn-on wire.  
* Parametric Bass EQ: Features Bass Boost, adjustable Band  
Width (wide & narrow), Low Pass and Subsonic Filter.  
* Clipping Indicators: Visually indicates audio signals Pre-Clip,  
Soft Clip and Hard Clip  
* Balanced Line Output: Ultra clean DIN variable high voltage  
output for driving mono amps.  
* Remote Output: Driver circuit to turn on amplifier when  
module activates.  
* Parametric Bass EQ: Provides a wide array of subwoofer output signal  
shaping controls to enhance bass response and sound quality including  
Bass Boost, adjustable Bandwidth (wide and narrow), Low Pass and  
Subsonic Filter.  
* Accepts a wide range of incoming music signal levels while  
accommodating all types of head units and signal processors and  
controlling the output level to the amp to maximize a signal strength up to  
9 volts.  
* Clipping Indicators: Visual clipping indicators provide indication of  
damaging clipped signals to help protect the subwoofer(s) and amplifier.  
Includes pre-clip, soft-clip and full-clip indications.  
* Music Shaping: Shapes the music signal to achieve deep bass notes as  
low as 15Hz.  
* Bass Remote: Features for subwoofer Level control with built-  
in clipping indicators.  
* Input & Output Level Control: Allows for gain matching both  
radio and amplifier audio signals.  
* Bass Remote: Included bas Remote features built-in clipping indicators  
allows direct bass control from in-dask or under-dash.  
MX-2 Deluxe High To Low Level Converter  
MX-4 Add A Sub High To Low Level Converter  
* Converts High Level OEM speaker wires to Ultra Clean RCA  
Low Level Outputs  
* Converts High Level OEM speaker wires to Ultra Clean RCA Low Level  
Outputs  
* High Level Inputs: Accepts all types of High level Inputs  
including floating ground and high voltages up to 30 volts.  
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects  
music signals from the OEM wires and activates the MX-2. As  
an option, the module also offers a remote turn-on wire.  
* High Level Inputs: Accepts all types of High level Inputs including  
floating ground and high voltages up to 30 volts.  
* Audio Signal Sense / Hardwire Turn-On: Audio sense detects music  
signals from the OEM wires and activates the MX-4. As an option, the  
module also offers a remote turn-on wire.  
* Remote Output: Driver circuit to turn on amplifier when module * Remote Output: Driver circuit to turn on amplifier when module activates.  
activates.  
11  
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Accessories  
5V  
ON  
SLAVE  
3V  
7V  
OFF  
MASTER  
35Hz  
250Hz  
1V  
9V  
15Hz  
35Hz  
TEST TONE  
65Hz  
RED - CLIP  
GREEN - 9V  
MODE  
LOW PASS  
FILTER  
OUTPUT  
LEVEL  
SUBSONIC  
FILTER  
24 dB/OCT  
24 dB/OCT MAXX-LINK  
MLX-100  
9V  
0.2V  
0
180  
0dB  
+10 dB  
30Hz  
100Hz  
INPUT  
LEVEL  
PHASE  
BOOST  
BANDWIDTH  
FREQUENCY  
PARAMETRIC BASS EQ  
-6dB  
BYPASS  
NORMAL  
RED - CLIP  
GREEN - 9V  
-20dB  
0dB  
LEVEL  
12  
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PART#: S611  
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