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Car audio i hooked up an amp of mine and the rca jacks on the amp are causing the sub in my car to freak out why?

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The most common cause for this type of oscillation is an open shield ground. An open shield in the head unit is more common than an open shield in the amp. You need to test the shield ground with an ohm meter. The following page explains this in detail.

Temporary Shield Ground Repair

Posted on Apr 19, 2008

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I have checked all connections to my amp battery,head unit,remote or trigger wire,fuses,power cable,rca leads,ground wire,amp has a green led light on it indicating if it works ok,red if it`s not,light...


Your amp could be in protection mode! Sometimes turning up to high or wires touching will put in protection mode! It will have to be unplugged for a day or two to drain all power out of the memory. Leave accessorie/ignition wire hooked up, just not power and ground wiring. It should reset itself.

Jan 22, 2010 | Lightning Audio B4.250.2 Car Amp

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ALL THE WIRES ARE RAN CORRECTLY,THE GROUND IS SECURE UNDER A BOLT UNDER THE SEAT,THE SUBS ARE HOOKED UP RIGHT,BUT THE PROTECTION LIGHT IS STILL ON


the protection is on because if any speaker has internal electric problems as open circuit or short circuit, need to be checked

Jan 03, 2010 | Boss C650 Car Audio Amplifier

1 Answer

My output rca jacks are not working. where can i buy some more to fix my amp?


The thing about Jl audio amp is that you have to choose between using the sub output or the the rca output. In order to use the rca output you will have to switch a switch next to the gain level. And it should be label low/high voltage. If you want to use the sub output then leave it on low if you want to use the rca output then switch it to high. I hope that solve your problem

Oct 11, 2009 | Jl Audio 500/1 Car Audio Amplifier

1 Answer

The green light stays on but sound comes out like a skipped cd


Check your RCA jacks. Wiggle them around a little, and see if it changes anything.. It could be a bad RCA< or the inputs them self. Could also be caused by over loading the amp. if nothing changes when you wiggle the RCAs then disconnect one of your subs. If disconnect the sub makes it play right then your impedance is to low, and is causing the amp to clip.

Aug 21, 2009 | Kole audio QX2-980 Car Audio Amplifier

1 Answer

Unwanted bass coming out of my subs


there has to be sumthn hooked up wrong bc i have had same problem with my 12' subs but it was simply a matter of my rca jacks but sense you have checked them try rewiring the speakers if that does not work then your rca module may be burned out within the amp..iso then check the amp by taking the cover off and making sure nuthn is burned on the inside.or if any wires are loose or touching.

Feb 24, 2009 | Kenwood eXcelon KAC-X812D Car Audio...

1 Answer

Red over light is on


I believe you have a short in your RCA jacks. Try unplugging both RCA's and see if the red light goes off. Your amplifier is in what they call protection. Meaning something is causing the circuitry to fail.

Feb 10, 2009 | AudioBahn A2800E Car Audio Amplifier

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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!

Feb 09, 2009 | AudioBahn A2002T Car Audio Amplifier

1 Answer

Cant figure out my car audio problems!!!!!


There are a couple of tests you can perform. I'd first recommend checking the shield ground. You'll need an ohm meter. The details can be found on the following page.

RCA shield ground test

You can also test the output with the multimeter. Set the multimeter to AC volts. If it's not an auto-ranging meter, set it to a voltage range of ~2v AC. Disconnect the RCA cables from the head unit. Touch one meter probe to the outer ring of the head unit's RCA jack. Touch the other probe to the metal contact in the center of the RCA jack. With the head unit near full volume and a clean signal source, you should read at least one volt on musical peaks. If you have a bass disc or a test tone disc (~60hz sine wave), use those.

May 04, 2008 | MTX Thunder 8302 Car Audio Amplifier

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