My rear speakers are producing random static sounds, they occur randomly and are quite loud. It is not any sort of feedback from the motor as it happens when the car is off also. Noise occurs when RCA's are connected or disconnected from the amp, can happen when amp is turned on via trigger wire.

Question is: Does this sound like an amp dying issue or an electrical/earthing issue?

Thanks in advance

I'd check all the grounds first mate, could have a loose one somewhere or an exposed wire

I would say dead amp or speaker terminal touching earth

Is it like a scratching rattling sound by any chance?

How many of the speakers can you hear the noise through?

All of them, or just one?

Does it get worse the louder you turn up the volume?

Edited 24/09/09 02:08 PM24/09/09 02:08 PM by smicky

For instance the noise has happened when I have had the ICC off and the car not even running, key in ACC position. My amp trigger runs off the lighter so it was turned but not receiving an input signal. Volume doesn't appear to make it worse or better. While it was happening I pulled the RCA's out of the amp and the noise persisted.

What grounds should I check, is there a big main earth wire from battery to body/motor??

Mick, I would take a stab and guess if it is still there when the RCA's are unplugged, and the car is just running off the battery then the problem 'may' lie somewhere between the AMP and your speakers... Or maybe even the AMP itself.

Does your amp have a fan built in?

What sort of amp is it?

As for the power cable runs - if you check your battery you should find there will be the factory black running to your car body, and the factory red running to the engine (sort of - a black box actually)...

You should also find another RED running back through your car to the amp.

Check the RED is secure, and not running past anything it shouldn't...

Your ground will 'normally' be secured (if in the boot for instance) with a bolt to the car body also - make sure this connection has had the paint sanded back and is bare metal on metal...

Check that you have the correct fuses also on the power runs.

(I dont think this is the cause of the issue however)...

Also try to check the trigger wire connection. I have noticed that I am getting loads of feedback recently since having the lighter socket replaced - havent bothered to look into it at this stage, however crazy levels of hissing and noise are being heard when running my ipod into the AUX input while its charging. (Again I havent bothered to looking into it yet so might not be the problem either, but worth checking)...

Again I would take a guess and say I think it might be your amp, or something between the AMP and speakers...

Try to trace all the speaker cable runs and double check your cable connections...

If you have a spare amp - try to power the speakers with it and see if you have the same problem...

Hope this helps!

Noise is probably from the lighter where you have taken it for your remote on which would mean a bad earth or just noise through the standard electrical system.

I have finished my install with new head unit and the bastard noise is still there as I have always had bad noise but was worse once I moved the standard battery to the boot. I will try powering the head unit directly from the battery and not the lighter but still leaves the aux to introduce noise as its still in the standard loom somewhere.

Fault find is the only way as painful as it is!

I have installed a tv/dvd player and amp in my car and I get the noise through the speakers when the engine is running and the noise goes up in pitch when I accelerate which makes me think it’s from the alternator. If I disconnect the RCA’s from the amp the noise goes away which means the noise is coming from the head-unit. I have run the positive and negative from the head-unit directly to the battery and as part of the test I ran the auxiliary to the battery. I still got the noise. I have purchased a “ground loop isolator” which goes between the amp and head-unit but I still have the noise. Before I put the amp in I had the head-unit hooked up directly to the speakers and I also had the noise. When I first purchased the car I had the ipod adapter (ford original part) and I had the noise. I would love to know how to fix the noise.

what brand tv/dvd player is it

nothing special, it's an Eonon.