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My v12 amp showing Power and Protection at the same time . Have no sound ! Could it be my rca cords to the Deck ?

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Maybe the ICs audio amplifiers are in short circuit,or one of the speakers are in bad conditions.

Posted on Apr 13, 2008

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My jbl gto75.4 red light is staying on and no sound what can the problem be.


check the cord from deck to amp when you trun on the deck it should go from red to green some of amps you do need to run a blue wire from deck to amp. that the remot wire.. so you don,t need it going bysingle from the rca cable... I hope this help you out ty

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I have a 1400 watt cruch amp & i hooked it up myself. when i turn the radio on the power wire on the amp comes on, bt if the audio cords are hooked up, the protection light comes on. if i dnt hook the...


Should the amplifier go into protect mode, simply disconnect all RCA and 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 RCA cables 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.

Dec 08, 2010 | Mobile Authority A-500 Car Audio Amplifier

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Trying to increase volume on car deck when doing so the amp just shuts off, then amp makes a burning popping sound and smells like something burnt up and 3 sec later amp kicks on and still works, none of...


Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Please check impedance on speakers as they coyld be fried as well. A thumbs up would be greatly appreciated if this answer is helpful to you

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Oct 03, 2010 | Orion HCCA-D2400 Car Audio Amplifier

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Got a problem with my car amp.Everything was working fine until 2day.Amp goes in to protection mode.Jumps from power to protection indicator every i would say 3 seconds and each time it goes in to...


Ok check the remote wire running from the headunit to the amp should be giving v12 feed whiles headunit is on.

check or change grounding position.

take cover off the amp as the circuit may be over heating.

Sep 22, 2010 | Car Audio & Video

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Protect mode is on all the time.It started making my speakers sound like the rca were touching then went to protect mode.no fuses blown now protect mode stayson,pretty new amp barely been used


POWER IT UP WITH NO SPEAKERS CONNECTED AND NO RCA INPUTS. IF IT STILL GOES INTO PROTECTION, THEN IT WILL NEED SERVICE. WHAT YOU PROBABLY HEARD AT FIRST WAS THE OUTPUT TRANSISTORS SHORTING AND STARTING TO SEND DC OUT TO THE SPEAKERS WHICH WOULD DESTROY THEM AND FURTHER DAMAGE THE AMPLIFER, SO THE PROTECTION CIRCUITS SEE THIS AND SHUT THE AMPLIFIER DOWN. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE....V

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1 Answer

My alpine v12 turns on but no sound


no you don't have to hook up both of the power terminals. but should have it hooked up so you get the proper power to the amp. use a disubution block with two 8 gauge wires.

do you know if the radio's rca jack's are good? have you ever had another amp in the car? if it worked before try new rca's from the radio to amp. recheck all connections from amp to speakers and make sure no wires fell off.

Sep 22, 2009 | Alpine MRD-M605 - V12 MONO AMP 600WX1 RMS...

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Amplifier displays "CUR"


Hello anwbrown,

The "CUR" display means that the amp is drawing excessive current and the protection circuit is activating. Too low impedance or shorted speakers will cause the amp to draw excessive current.

The Alpine V12 is a Class D mono amp with only one set of speaker outputs. All versions, M301, M501, and M1001 are only stable to 2ohms. Assuming that all 6 of your connected subwoofers and speakers are 4ohm and they're all connected in parallel, the amp sees a .67 ohm load, far below it's rated impedance.

When brand new, the amp could probably operate at low to moderate volume levels without drawing excessive current. But as electronic components age, their tolerances change and they become less able to withstand excessive current or mismatched impedances.

I'd get a 4-channel amp and drive the 4" speakers off the front channels and the 6X9's off the rear channels. And just power the subs off the V12 making sure that they are connected to show a minimum load of 2ohms.

Hope this helps.

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Audiobahn amp help...


You have a Direct Short in the System Between the Head Unit and the Amp. Check the Ground on the Amp and then Check all the Wires behind the Stereo and the Common Ground There. You could even have a Spot in the New RCA Cables that is Touching Metal Somewhere. Please Rate My Response! Thanks!

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