[302]

I have really bad feedback coming through my stereo, and the whining sound goes with the RPM's of the car. I have tried hooking the ground directly to my battey and that didn't do anything, I just put in a new alternator and that didn't work ethier. My amps and crossover are only about 8 months old. The sound seems to be coming through the front speakers mainly. Before I put the new alternator in, when I plugged in the subs it was really bad. Now with the new one it doesn't do that but the feedback is still there. When the front speakers aren't plugged in it doesn't make any whining noises at all. I'am completly confused and lost at this point. Any suggestions would be greatly appreciated. Thanks.

[Boghog]

What kind of ign wires are you using? Are the power inputs isolated from the cars wiring? You may have to add capacitors to the circuits to block the ripple.

[Poppy]

Isn't there a condensor looking thing attached to the ignition coil to reduce radio interference?

[302]

My power wire is a 4 gauge wire that goes from my battery to the trunk, then splits into 3, 8 gauge wires that go to my amps. The crossover wire is a 16 gauge that is taped into at the splic box in the trunk. All of the remote wires for the amps and crossover come directly from the remote wire from the stereo. Everything is grounded to my trunk latch bolt. The strange thing is before when I disconected the alternator the noise stoped, but with the new one, the noise just changes to more of a fussy sound. I also put in a box between the stereo and amp for the front speaker that was supposed to filter out any noise. I put that in probably almost a year ago though. The noise was always there, but very quiet. It all of a sudden got loud when one of my 6X9's came disconected and I tried to hook it back in, wich I wasn't even able to reach it at the time anyway.

[Dominick]

Originally Posted by Poppy

Isn't there a condensor looking thing attached to the ignition coil to reduce radio interference?

Some times more than one.

[Dominick]

You may try this site,
Car Audio Noise Troubleshooting

[mark v]

Ground it all directly to the battery.

[302]

As I said previously, I have already tried hooking the grounds directly to the battery and it didn't matter. I was looking at the link Dominick posted, and it sounds as I have alternator noise. I also have some feedback/ poping from turn signals, swiches ect.. Thanks.

[Zephyrman]

Sounds like you may have some speaker wires that are too close to your power wires and the frequency of the current is passing to the speakers in the form of noise. I encountered something like this once when I wired a whole new system into one of my old cars and noticed when I put a new higher amp alternator in. Couldn't figure it out until i got frustrated and took a look at my wiring. In an effort to keep the install as clean as possible I had run all my wires as close as possible to each other. The speaker wires were all running tight to the power wire for the amp and I noticed that as I moved the wiring around with the stereo on and car running at idle, the sould would change. I moved everything so that it was all about 4-5 inches away from the main power and the noise was gone. Give that a go and see if it helps.

Z

[302]

Thanks for the info. I'll deffinatly will give that a try. It makes perfict sense because when I rewired my system, I have a amp for each set of speakers. I routed my front speaker wires from the trunk to the dash along the same side as my 4 gauge power wire from the battery. Thanks.

[gadjet]

i agree dont run your power wire close to your speaker wire also you can try a noise loop isolator from wally world hooks into the out on the rca on the amp then has an out that you plug your rca cables into also i believe they make a noise isolater that you can put on your power wire not sure about that but worth checking out

[mark v]

I have used noise insulators in the past but they didn't work at higher volumes.