Amp buzzing my front and rear speakers - Page 2

TwoFour · Apr 16, 2009, 08:55 PM

I ran a wire around the RCAs to the screw on my head unit

majestic* · Apr 17, 2009, 09:14 AM

You are creating the referrence ground by running a ground wire from the ground of the deck to the ground of the amp.

In an ideal situation all your grounding points should be grounded in one spot. When you have more than one grounding point throughout your vehicle that is how ground loops are created.

Depending on how high current your system is... you may want to consider running a battery ground as well (ground wire from the battery to the ground of your amp/system).

Hope this helps,

Nick

TwoFour · Apr 17, 2009, 12:07 PM

I ran the ground that is supposed to go on the bolt right behind the head unit and I extended it all the way to the back with all my grounds for the amps. Still noise, it must be grounded somewhere else?!?! Does the stock white mitsu harness have a ground, maybe it's grounded elsewhere?

TwoFour · Apr 17, 2009, 12:08 PM

what gauge of wire should I hook to my ground of my battery?

TwoFour · Apr 17, 2009, 12:44 PM

Also weird thing to note when I had that ground for the headunit pulled I tried to turn the acc on and the headunit came on! Without it's ground! So it must be grounded elsewhere!

NWEvoViii · Apr 17, 2009, 01:38 PM

Your radio could be grounded out from the antenna plug.

For the whining problem, You could ground out your RCA's, ground loop isolator as some people mentioned, try a different radio (it's possible that your radio has bad outputs).

Also, Make sure your RCA's are away from your fuel pump, There could be a feed from the fuel pump going to your RCA's if their near each other.

TwoFour · Apr 17, 2009, 06:34 PM

Okay so weird! Update: everything unplugged to my amp except power and remote wire and the front speakers. Well the humm noise is there in my speakers. No rcas
Plugged in, not even grounded! What the hell is wrong with this picture?

biggie5252 · Apr 17, 2009, 07:33 PM

Then there's a problem with your amp, or some sort of major wiring issue. You might actually look under the hood for any issues with your ignition system or alternator.

TwoFour · Apr 17, 2009, 10:57 PM

What should I look for? just anything out of the ordinary?

TwoFour · Apr 17, 2009, 11:04 PM

Could it be the size of fuse that I have in the Power Wire? I have a 60A agu fuse in there. The two amps I have add up to 70A I believe

TwoFour · Apr 18, 2009, 02:37 AM

Maybe my wiring I used isn't good enough? or maybe the speaker wire is grounded out somewhere?

biggie5252 · Apr 18, 2009, 06:37 AM

Quote:

Originally Posted by TwoFour

What should I look for? just anything out of the ordinary?

Yeah, pretty much. See if any of the plug wires are cut/damaged, coils aren't damaged.

Speaker wiring grounding out could be a culprit. Are you using stock wiring throughout, or have you replaced it?

majestic* · Apr 18, 2009, 06:55 AM

What amp is this?... I haven't heard of anyone having noise issues without having the signal (RCAs) plugged in... usually when you unplug the signal wires the noise goes away - which means the problem is signal related.

If you unplug your rcas and you still have the problem... I would get a couple friends over, hold hands in a circle around your car and chant to get the gremlins out of your car...

For sake of argument, try another amp - if you have one. Isolate whether it's the amp or not before you start ripping more stuff apart to check your wiring and such.

Hope this helps,

Nick

biggie5252 · Apr 18, 2009, 11:50 AM

Does it buzz with the engine off or only while running? What are differences in the noises between the engine running and off (besides the pitch change with rpm).

I reread your original post, so your speakers went pop. What happened after that? Was there still music? Noise? Was the headunit acting normal? What made you determine that the amplifier had gone bad?

TwoFour · Apr 18, 2009, 12:04 PM

I replaced the stock speaker wire.