Crunch Ground Pounder Owner's manual

Brand: Crunch

Model: Ground Pounder

Category: Car audio amplifiers

Type: Owner's manual

GPA700.2/GPA1100.2/GPA1800.2

GPA1000.4/GPA1500.4/GPA2000.4

GPA1000.1/GPA1500.1/GPA2000.1/GPA3000.1

AMPLIFIERS

GroundPounderGPAAMPLIFIERS

INDEXPAGE

Crunchisproudtointroducethefinesthighendcaraudioproductsavailableandwouldliketothankyouforyour

continuedsupport.TheGroundPounderSeriesrangeofproductshavebeendesignedtoaveryhighlevelof

performance,withfeaturesunavailableinanyotherproducts. Alloftheamplifiershavevariablecrossoversbuiltin,

withaddedtouchessuchassubsonicfilter,bassequalizationandabassremotecontrolmoduleoptionthatallows

basscontrolfromwithinreachofthedriversseat.

Toinsureyearsoflisteningpleasure,allamplifiershaveabuiltindiagnosticmodethatwilldetectshortedspeaker

leads,lowimpedance,dangeroushightemperatures,DCshortsandwillshutdowntheamptohelpprevent

seriousdamage.

Amplifier Feature Descriptions..........................................................................................................................................................1

GPA700.2 / GPA1100.2 / GPA1800.2 2-CHANNEL AMPLIFIER APPLICATIONS.......................................................................2-3

GPA1000.4 / GPA1500.4 / / GPA2000.4 4 CHANNEL AMPLIFIER APPLICATIONS....................................................................4-5

GPA1000.1 / GPA1500.1 / GPA2000.1 / GPA3000.1A/B CLASS 1 CHANNEL AMPLIFIER APPLICATIONS6

Features and Specifications..............................................................................................................................................................7

Setting Up SystemsAfter Installation For Best Performance..............................................................................................................8

Troubleshooting and Diagnostics......................................................................................................................................................9

MAXXLINK INFO............................................................................................................................................................................10

Warranty Info..................................................................................................................................................................................11

Full range stereo / Full range mono

4, 3 and 2 channel full range / 2 way active, with mono bass /

front/rear high pass using a 2 channel model for mono sub bass

..................................

Basic mono amplifier application

Thecontentsof thismanualmaynotbereproducedorcopiedwithoutthe

writtenconsentof MAXXSONICSUSA,Inc.

Besuretocheckusoutat

forproductreviewsandtutorialsfor

gettingthemostoutof youraudiosystem.

www.youtube.com/maxxsonicsusainc

GENERAL INSTALLATIONPROCEDURE

SystemDesign

Installation

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.

General:

Powerandgroundconnections :

TIP:

Safeconnectionsequence:

Powerupthesystem:

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.

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.

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.

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.

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.

(seethefeaturesmatrixonpage9forpropergaugecablesperamplifier)

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.

NOTE:ThisMatrixisageneralrule

ofthumb.Pleaserefertothe

manufacturersspecific

requirements.GPA specifications

canbefoundonpage9.

7-10ft. 10-13ft. 13-16ft.

16-19ft. 19-22ft. 22-28ft.

SYSTEM

AMPERAGE

35-50

50-65

68-85

85-105

105-125

125-150

WIRELENGTH

WIREGAUGE

WOOD

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 LEDindicatesthepoweredupandturnedoncondition

AllCrunchamplifiersfeatureacomprehensivediagnosticsystem,withspeakerleadshortcircuit,and

amplifierDCfaultsindicatedbythered “ LED.

POWER

PROTECT”

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.

The slide switch selects theinternal crossover functions:

-The input signal is routed directly to the RCA jacks, regardless of the setting

simplifying daisy chaining ofamplifiers.

Selects the built in filter, variablefrom 60 Hz to1.2kHz.

Bypasses all crossovers forfull frequency range operation.

Selects the built in , variable from 30Hz to 250Hz.

: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO

for bridging operation

: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the

HIGH level (wire) inputs.

: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.

: The line output passes through signal from the line inputs which allows you to daisy

chain multiple amplifiers from one signal.

X-OVER

LINE OUT X-OVER

-HPF: HIGH PASS

-FULL:

-LPF: LOW PASS

MODE

HIGH INPUT

LINE INPUT

LINE OUTPUT

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.

GPA700.2/GPA1100.2/GPA1800.2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 switch which allows you to select 2, 3 or 4 channel

operation.

The slide switch selects the internal crossover functions:

-The input signal is routed directly to the RCA jacks, regardless of the setting

simplifying daisy chaining of amplifiers.

Selects the built in filter, variable from 60 Hz to 1.2kHz.

Bypasses all crossovers for full frequency range operation.

Selects the built in , variable from 30 Hz to 250Hz.

: The mode switch allows you to choose Stereo for full range 2 channel operation or MONO

for bridging operation

: If your radio/CD player does not have unbalanced (RCA) outputs, you can use the

HIGH level (wire) inputs.

: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.

: The line output passes through signal from the line inputs which allows you to daisy

chain multiple amplifiers from one signal.

Mode

X-OVER

LINE OUT X-OVER

-HPF: HIGH PASS

-FULL:

-LPF: LOW PASS

MODE

HIGH INPUT

LINE INPUT

LINE OUTPUT

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

-The signal is routed directly to the RCA jacks, regardless of the

setting simplifying daisy chaining of amplifiers.

Allows you to adjust the crossover filter from 15Hz to 55Hz.

Allows yo to adjust the crossover filter from 40Hz to 150Hz.

Adjusts the input sensitivity from 0.2 volts to 6 volts.

The Bass EQ is adjustable from 0db to 9dB.

This is the input jack for the remote Level control.

: The line input accepts unbalanced (RCA) inputs from 0.2V to 6V.

: The line output passes through signal from the line inputs which allows you to daisy

chain multiple amplifiers from one signal.

LINE INPUT LINE OUT X-OVER

-SUBSONIC:

-LPF: LOW PASS

LEVEL:

BASS EQ:

REMOTE:

LINE INPUT

LINE OUTPUT

CAUTION

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.

GPA1000.1/GPA1500.1/GPA2000.1/GPA3000.11-CHANNEL MONO AMPLIFIERS

GPA700.2/GPA1100.2/GPA1800.22CHANNEL AMPLIFIER APPLICATIONS

FULL RANGEMONO

This is the most basic application for the GROUND POUNDER Series 2 channel

amplifiers.

Connect the to the Radio/CD with good quality RCAcables.

The switch must be in the position.

N/Afor full range operation.

Refer to the section

1. Interconnect cable checklist:

LINE INPUTS

2. Crossover Switch:

X-OVER FULL

MODE STEREO

3. Crossover frequency control checklist:

4. Line Level:

NOTE: Minimum final loudspeaker impedances:

4 &-2-Ohms stereo mode or 4-Ohms mono mode

“Setting up systems after installation for best performance”.

This application illustrates the basic mono bridging method for all Crunch 2 channel

amplifiers.

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.

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.

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 -.

- The switch must be in the position.

N/Afor full range operation.

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 roll-off.

Interconnect cable checklist:

Important:

Switch setting checklist:

X-OVER FULL

MODE MONO

Crossover frequency control setting checklist:

TIP:

Minimum final loudspeaker impedance:

- 4-Ohms mono.

FULL RANGESTEREO

FULL RANGE

MONOSPEAKER

The 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.

HIGHLEVEL

GRAY:CH1SpeakerInput+

BROWN:CH1Speakerinput-

Black:ChassisGround

GREEN:CH2SpeakerInput-

White:CH2SpeakerInput+

ORANGE:CH3SpeakerInput+

PINK:CH3Speakerinput-

Black:ChassisGround

BLUE:CH4SpeakerInput-

YELLOW:CH4SpeakerInput+

Usethisconnectorfor2CHamplifiers

Usebothconnectorsfor4CHamplifiers

REMOTETURN-ON

CHASSISGROUND

TOBATTERY +12voltsVIA FUSE

FULL RANGE

STEREOLINEINPUT

FULL RANGE

MONOLINEINPUT

VIA Y-ADAPTER

FROMMONOSOURCE

REMOTETURN-ON

CHASSISGROUND

TOBATTERY +12voltsVIA FUSE

FULL RANGE

SPEAKERS

GPA700.2/GPA1100.2/GPA1800.2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

to determine maximum amplifier power requirements.

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

stereo RCAto RCAcable.

Connect the mono speaker positive terminal to the RIGHT +, and its negative terminal to

LEFT -.

switch in the position.

Please note that these frequency points are suggestions only. Refer to the loudspeaker

manufacturer specifications and the section

- Refer to the section

Interconnect cable checklist:

Mono bass woofer wiring:

Switch setting checklist:

- Highs amplifier: X-OVER HPF

MODE STEREO

- Lows amplifier: X-OVER LPF

MODE MONO

Crossover frequency control checklist:

Highs amplifier:

- HI PASS:100 Hz

- LOW PASS:N/A

Lows amplifier:

- HI PASS(Subsonic filter): 10 Hz to 40 Hz

- LOW PASS:80 Hz

Level control checklist:

Minimum final loudspeaker impedances:

- 2-Ohms per channel stereo.

- 4-Ohms mono bridged.

“Setting up systems after installation for best

performance”

“Setting up systems after installation for best performance”

FULL RANGE

STEREOLINEINPUT

STEREO

INTERCONNECT

RCA CABLE

MONOBASS

SPEAKER

REMOTETURN-ON

CHASSISGROUND

TOBATTERY +12voltsVIA FUSE

FULL RANGE

SPEAKERS

GPA1000.4/GPA1500.4/GPA2000.44CHANNEL AMPLIFIER APPLICATIONS

4CHANNEL FULL RANGESYSTEM

2or3CHANNEL FULL RANGESYSTEM

Here we show how to use the 4 channel amplifiers as straight forward discrete 4 channel

full range units.

- Connect the four inputs of the amplifier to a Radio/CD with quality RCAcables.

FULL

- 4 CHANNEL

- Refer to the section

Interconnect cable checklist:

Switch setting checklist:

- 1/2CH X-OVER:

- 3/4CH X-OVER:

MODE:

Crossover frequency control checklist:

Channels 1/2:

- HI PASS:N/A

- LOW PASS:N/A

Channels 3/4:

- HI PASS:N/A

- LOW PASS:N/A

Level control checklist:

Minimum final loudspeaker impedances:

- 2-Ohms per channel.

“Setting up systems after installation for best performance”

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.

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.

-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.

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.

-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.

FULL orHPF(highpass)

FULL orLP (lowpass)

- 4CHANNEL

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.

-Refertothesection

Interconnectcablechecklist:

Important:

Switchsettingchecklist:

-1/2CHX-OVER:

-3/4CHX-OVER:

MODE:

Crossoverfrequencycontrolchecklist:

Channels1/2:

-HIPASS:N/A

-LOWPASS:N/A

Channels3/4:

-HIPASS:N/A

-LOWPASS:N/A

TIP:

Levelcontrolchecklist:

Minimumfinalloudspeakerimpedances:

-2-Ohmsperchannelinstereomode.

-4-Ohmsmonobridged.

“Settingupsystemsafterinstallationforbestperformance”

MONO

ORSUBBASS

SPEAKER

REMOTETURN-ON

CHASSISGROUND

TOBATTERY +12VoltsVIA FUSE

FULL RANGE

SPEAKERS

FULL RANGE

SPEAKERS

FULL RANGE

LINEINPUTS

MONOLINE

INPUTS

FULL RANGE

STEREOLINE

INPUTS

Basicapplication

These sub bass amplifiers can be used in any of the bi-amplification systems described in

this manual, replacing the 2 channel amplifiers as per the illustrations.

Connect the inputs to a suitable source, e.g. a head unit with good quality RCA cables.

Connect the LINE OUT to the inputs of the system highs amplifier.

Use at least #12 gauge speaker wiring. The amps have dual speaker terminals,

simplifying the hookup of multiple speakers

Refer to the section

Interconnect cable checklist:

Crossover frequency control checklist:

LOW PASS: 40Hz to 150Hz

SUBSONIC:15 Hz to 55 Hz

BASS EQ: 0 to +9dB

Level control checklist:

Minimum final loudspeaker impedance: The GPA1000.1 & GPA1500.1 are 4 & 2-

Ohm stable only (not 1-Ohm stable).

The GPA200.1 & GPA3000.1 are 4, 2 & 1-Ohm stable.

“Setting up systems after installation for best performance”

FULL RANGE

STEREOLINEINPUT

NOTUSED

Y-ADAPTOR

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.

GPA1000.1/GPA1500.1/GPA2000.1GPA3000.11CHANNEL APPLICATION

PARALLEL MONO

SUBWOOFERS

2-OHMSEACHMINIMUM

MONO

SUBWOOFER

REMOTETURN-ON

CHASSISGROUND

TOBATTERY +12VoltsVIA FUSE

DESIGNATED

MONOOUTPUT

FROMHEADUNIT

GPA700.2 GPA1100.2 GPA1800.2 GPA1000.4 GPA1500.4 GPA2000.4

MAXX Output Power Rating

4 Ohm 2 x 175 2 x 225 2 x 450 4 x 125 4 x 185 4 x 450

2 Ohm 2 x 350 2 x 550 2 x 900 4 x 250 4 x 375 4 x 900

1 Ohm n/a n/a n/a n/a n/a n/a

Mono Bridged at 4 Ohm 1 x 700 1 x 1100 1 x 1800 2 x 500 2 x 750 2 x 1000

Mono Bridged at 2 Ohm n/a n/a n/a n/a n/a n/a

Mono Bridged at 1 Ohm n/a n/a n/a n/a n/a n/a

General Specifications

Frequency Response -3dB 15Hz - 45KHz 15Hz - 45KHz 15Hz - 45KHz 15Hz - 45KHz 15Hz - 45KHz 15Hz - 45KHz

Total Harmonic Distortion 0.05% 0.05% 0.05% 0.05% 0.05% 0.05%

Variable Input Gain Control 0.2V - 6V 0.2V - 6V 0.2V - 6V 0.2V - 6V 0.2V - 6V 0.2V - 6V

Protection (short / thermal / overload) Yes Yes Yes Yes Yes Yes

Crossover Operation

Variable Hi-Pass 60Hz - 1.2KHz 60Hz - 1.2KHz 60Hz - 1.2KHz 60Hz - 1.2KHz 60Hz - 1.2KHz 60Hz - 1.2KHz

Variable Low-Pass 30Hz - 250Hz 30Hz - 250Hz 30Hz - 250Hz 30Hz - 250Hz 30Hz - 250Hz 30Hz - 250Hz

Variable Subsonic Filter n/a n/a n/a n/a n/a n/a

Bass EQ at 45Hz 0dB - 9dB 0dB - 9dB 0dB - 9dB 0dB - 9dB 0dB - 9dB 0dB - 9dB

Line Ou t Yes Yes Yes Yes Yes Yes

Hi Input

Yes Yes Yes Yes Yes Yes

Unbalanced Input (RCA Jack) Yes Yes Yes Yes Yes Yes

Balanced Input (Din Jack)

No No No No No No

Phone Jack for Remote Control No No No No No No

Remote Control Accessory

Miscellaneous

Power Terminal 4-Ga. 4-Ga. 4-Ga. 4-Ga. 4-Ga. 4-Ga.

Speaker Terminal 10-Ga. 10-Ga. 10-Ga. 10-Ga. 10-Ga. 10-Ga.

Fuse Number & Size 1 x 20 amp 2 x 20 amp 2 x 25 amp 2 x 10 amp 2 x 20 amp 2x 25 amp

Line Out L x H x W 9.21" x 2.23" x 9.1" 12.36" x 2.23" x 9.1" 13.94" x 2.23" x 9.1" 11.18" x 2.23" x 9.1" 12.36" x 2.23" x 9.1" 13.94" x 2.23" x 9.1"

4 CHANNEL

FEATURES

2 CHANNEL

GPA1000.1 GPA1500.1 GPA2000.1 GPA3000.1

MAXX Output Power Rating

4 Ohm 1 x 500 1 x 750 1 x 500 1 x 750

2 Ohm 1 x 1000 1 x 1500 1 x 1000 1 x 1500

1 Ohm n/a n/a 1 x 2000 1 x 3000

Mono Bridged at 4 Ohm n/a n/a n/a n/a

Mono Bridged at 2 Ohm n/a n/a n/a n/a

Mono Bridged at 1 Ohm n/a n/a n/a n/a

General Specifications

Frequency Response -3dB 15Hz - 150Hz 15Hz - 150Hz 15Hz - 150Hz 15Hz - 150Hz

Total Harmonic Distortion 0.05% 0.05% 0.05% 0.05%

Variable Input Gain Control 0.2V - 6V 0.2V - 6V 0.2V - 6V 0.2V - 6V

Protection (short / thermal / overload) Yes Yes Yes Yes

Crossover Operation

Variable Hi-Pass n/a n/a n/a n/a

Variable Low-Pass 40Hz- 150Hz 40Hz- 150Hz 40Hz- 150Hz 40Hz- 150Hz

Variable Subsonic Filter 15Hz - 55Hz 15Hz - 55Hz 15Hz - 55Hz 15Hz - 55Hz

Bass EQ at 45Hz 0dB - 9dB 0dB - 9dB 0dB - 9dB 0dB - 9dB

Line Out Yes Yes Yes Yes

Hi Input

No No No No

Unbalanced Input (RCA Jack) Yes Yes Yes Yes

Balanced Input (Din Jack)

No No No No

Phone Jack for Remote Control Yes Yes Yes Yes

Remote Control Accessory

Miscellaneous

Power Terminal 4-Ga. 4-Ga. 4-Ga. 4-Ga.

Speaker Terminal 10-Ga. 10-Ga. 10-Ga. 10-Ga.

Fuse Number & Size 2 x 20 amp 2 x 25 amp 3 x 25 amp 100 amp ANL

Line Out L x H x W 13.94" x 2.23" x 9.1" 14.72" x 2.23" x 9.1" 17.87" x 2.23" x 9.1" 19.84"x 2.23" x 9.1"

MONO BLOCK

FEATURES

2x60amp

SETTINGUP SYSTEMS AFTERINSTALLATIONFORBESTPERFORMANCE

GPA1000.1/GPA1500.1/GPA2000.1/GPA3000.1

General:

Subsonic:

BassEQ:

LowPass:

LevelControlSetup:

LEVEL

Sitbackandenjoythemusic!

Atthispointyouarereadytogetmorespecificonthesettingsforyouramplifier.

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o’clock

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.

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o’clockpositionunlesslisteningata

lowvolumeoralowrecordingqualityasthiscanresultinhighdistortionandpossiblyclipping.

TheLowPasscontrolactsasaceilinganddoesn’tallowfrequenciestotherightofthedesiredsettingtobereproduced. The12o’clock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.

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 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 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.

GPA700.2/GPA1100.2/GPA1800.2/GPA1000.4/GPA1500.4/GPA2000.4

General:

HighPass:

BassEQ:

LowPass:

LevelControlSetup:

LEVEL

Atthispointyouarereadytogetmorespecificonthesettingsforyouramplifier.

-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o’clock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o’clock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.

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o’clockpositionunlesslisteningatalow

volumeoralowrecordingqualityasthiscanresultinhighdistortionandpossiblyclipping.

TheLowPasscontrolactsasaceilinganddoesn’t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.

sensitivitiesproperlytotheheadunitoutputsignallevel.

Itisimportanttomatchtheamplifier 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 inputto2volts.

IfyouarenotsurewhattheRadiooutputsensitivityis,followthesegeneralguidelines:

outputinthisapplication.

TROUBLESHOOTING A SYSTEM

The key to finding the problem in a misbehaving sound system is to isolate parts of that system in a logical fashion to track down the fault.

Description of the PROTECT system built into all GROUND POUNDER amplifiers

Amplifier heatsink overheating

Low output power

Fuses blowing

System does not turn on

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

LED lighting up under the following conditions:

1 -Asort circuit on the loudspeaker leads.

2 -An internal amplifier fault that causes a DC offset on the loudspeaker output.

Should the amplifier go into protect mode, simply disconnect all RCAand speaker leads, while keeping +12 volt, power ground and remote leads connected.

1. Now turn the amplifier back on, and if the diagnostic LED lights, the amplifier has an internal fault.

2. If not, plug the RCAcables back, and reset the amplifier.If it goes into diagnostic now, the fault lies in the input, either with bad cables or source unit.

3. If the amplifier seems fine with RCA cables 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.

The amplifiers will shut down when the heatsink temperature reaches 80 degrees centigrade, and turn back on once the unit has cooled down below that point.

1 - Inadequate cooling - relocate or remount to provide better natural airflow over the fins.

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

loudspeaker impedance.

1 - Check that level controls have been set up properly.

2 - Make sure that the battery voltage, as measured at the amplifier’s +12 volt and ground terminals, is 11 volts or more.

3 - Check all +12 volt and ground connections.

1 - The use of loudspeaker impedances below the recommended minimums will draw more current - check.

2 -Ashort on the main +12 volt cable from the battery to the vehicle chassis will cause the main fuse to blow.

3 - If an amplifier fuse blows continually, with only +12 volt, ground and remote leads connected, the amplifier may be faulty.

1 - Check all fuses.

2 - Check all connections.

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, the head unit’s +12 volt and remote leads to localize the problem.

Causes of overheating:

Noise problems

Hiss, or white noise

Electrical interference

System noise can be divided into two categories, hiss, and electrical interference.

1 - High levels of white noise usually occurs when amplifier level controls are turned up too high - readjust according to the procedures in section

2 -Another major problem that can cause excessive hiss, is a noisy head unit - unplug the amplifier input RCAcables, and if the hiss level reduces, the source unit is at fault.

The inside of an automobile is a very hostile electrical environment. The multitude of electrical systems, such as the ignition system, alternator, fuel pumps, air conditioners,

to mention just a few, create radiated electrical fields, as well as noise on the +12 volt supply and ground. Remember to isolate the problem - first unplug amplifier input RCA

cables, if the noise is still present, check the speaker leads, if not, plug the RCA’s back, and investigate the source driving the amplifier,one component at a time.

1 - This problem could be caused by radiation pickup of RCAcables too near to a fuel pump or a distributor, for instance, - relocate cables.

2 - Check that the head unit ground is connected straight to the vehicle chassis, and does not use factory wiring for ground.

3 - Try to supply the head unit with a clean +12 volt supply directly from the battery +, instead of using a supply from the in dash wiring/fusebox.

This type of noise can be more difficult to pinpoint, but is usually caused by some kind of instability, causing oscillations in the system.

1 - Check all connections, especially for good grounds.

2 - Make sure that no speaker leads are shorting to exposed metal on the vehicle chassis.

3 -RCAcables are notorious for their problematic nature, so check that these are good, in particular the shield connections.

”Setting up systems after

installation for best performance”

Aticking or whine that changes with engine RPM:

Aconstant whine:

BiggestPOWERsystems

ModeratePOWERsystems

SmallerPOWERsystems

V3Products,Level10Performance+1

YearWarranty

V1Products,Level5Performance

V2Products,Level7Performance+6

MonthWarranty

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.

DesignedandEngineeredintheUSA

www.maxxsonics.com

CRUNCH

Crunch Ground Pounder Owner's manual

Brand: Crunch

Model: Ground Pounder

Category: Car audio amplifiers

Type: Owner's manual

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Crunch Ground Pounder Owner's manual

Crunch Ground Pounder Owner's manual

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