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Hey all,
I have tried everything to get rid of this noise. I wired the entire system myself so I know I ran the wires right. The power wires are run on opposite ends of the car then the RCA's. The ground is right to the trunk floor and it is sanded down to raw metal. I don't know what elce to do. The noise is a high pitch squeeling noise that goes up and down with my engine rpm. Any suggestions? Please Help!!!
Thanks!

 
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The alternator whine (the noise you hear with the RPMs) is typically caused by what you've already checked, the ground or interference with RCAs. Sometimes the quality of RCAs makes a difference, better RCAs will have better shielding and block out more noise. Make sure your RCAs don't get anywhere near the power wires in the trunk. Other things though can cause noise, the ground on the Headunit for one. I also found out last weekend that sometimes a crossover too close to a power wire might cause some noise (if you have component speakers). Is the sound coming out of all speakers or a specific one? Make sure the ground is sanded good and secured good to the chasis. There might be something here that could help: http://www.crutchfield.com/S-E1OqUBk...ech/kb348.html It helped me when I first installed my amp. Thats all I got, Anybody else have any suggestions?

 
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try moving the ground wire.

 
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Thanks for all your help, I figured out the problem and it's fixed now

 
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Just out of curiousity, how did you fix it? To fix mine, I went to radio shack and they gave me a little transistor thing that connects between my RCAs and my amplifier. Fixed my whine right up.

 
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I used a PAC SNI 1. To get rid of my noise

 
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The way I fixed it was to re-run the rca wires a different way. I had them run through my center console where my shifter and e-brake are. I took the rca's out and ran them down the side of the center console and under the drivers side carpet, under the drivers seat and then under the back seats. I still hear a realy small wine when no music is on and I am realy listning but it is alot better then it was.

 
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BTW, it also helps to add a 2nd ground to your battery negative somewhere in the engine compartment. I also found that changing the wire to something thicker helped (went from 14 to 10 guage) for me.

 
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Adding a second ground wont do anything, just upgrade to larger grounding wires. And your OEM grounds and power wires are 8 guage, not 14. Upgrade to 4 or 0.

 
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Fosgate told me to do this to stop my rpm whine in my 150. I looked around online and it's recommended elsewhere, that is why I mentioned it.

 
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It turns out my wine is back for some reason... any more suggestions?

 
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did it loosed up or anything? or did the rca's get pushed off to the side?

 
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get better rca cables... happend to me too =)

 
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It's not the RCA cables, they are Monster Cable. I don't think they have loosened up either. I think it was always there, I just always kept the music up loud and I didn't hear it. I just have to try to re-locate the rca's again.
Any other suggestions would be great!
Thanks all!
Mox

 
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ive installed a noisy monster cable before, jsut cause its monster doesnt mean its immune

 
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I'd have to agree with whiterabbt, you can go out and spend all of your money on high end top of the line rca cable and you can still have engine whine. You need to find out the main source of your engine whine. There are many more variables involved than just location in general of sides of the car that your wires are run. You can have your power wire run from the battery to the amp....with your rca cable running from the head unit, out to your neighbors house, around his swimming pool, under his house, and behind the hedges, and back to your amp with the rca wire coming within 4 inches of your power wire right near your amp or even crossing over the power wire in one small spot and still have engine whine present. Not as likely but it can still happen. When routing power wires and rca cables a matter of a few inches can make a big difference. Try out a bunch of different locations, varying distance with the wires by only a few inches and you may get rid of your problem.

For me personally in past experiences, the location of the ground has made the most difference, try a different ground a few feet away from where your ground is currently, hopefully that will help solve your problem....good luck

tom

 
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Rabbit, my problem still persists. Absolutely every aspect of the installation of my MTX 6304 is perfect (groundings tight, shaved etc) So I guess im gonna relocate to the trunk. Just to let you guys know, a amp cannot be successfully installed under the seat of a 7thgen, dont even try it. (and yes my HU is grounded to the chassis)

 
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True that...I will check them and maybee try a different RCA and see if that helps.
Thanks!

 
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MangoEX,
You said you are re-locating your ground to the trunk right. Where did you have it before? I have my ground right to the chassis of the trunk. I'm not realy sure where elce to put it since my amps are in the trunk.

 
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I have the same problem. I happen to work at PolkAudio and the install guys told me that the antenna ground in Honda's is sometimes bad. It happens a great deal in our cars from what he said. I still haven't had time to try to fix my problem but my whine comes and goes as it pleases. Hopefully it will just go on a long sabatical.

 
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When you say that the ground is bad, do you mean the factory ground comming off the head unit? If so, what is the best way to fix it?
Thanks!
Mox

 
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Ill tell you exactly how to fix that. I had that same problem with my JL XR tweeters making this high pitch noise, and basically it is coming from the RCAs. I went to radio shack and they gave me a small cylinder thingy that connects between the amplifier and the end of the RCA cable. It filters 95% of the alternator whine. There is a very faint whine that still occurs through my tweeters when my system is off, but when it is on, you can't even hear it when the music is low. I don't know the exact name, but I promise you if you get this thing from radio shack, it will work. Just tell the radio shack people the problem and describe what I told you, small cylinder shaped mechanism that filters ambient sounds and connects between the amplifier and RCAs and they should know what your talking about. PM me if you need the exact name and maybe ill check to see what it is called.

 
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Thanks for the help, I will try and pick that up today while I am out. I hope it works like you say it will.
Thanks for all the help!
Mox

 
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That transister from radio shack fixed it right up...I can hear it a little if my sterio is all the way down but just barely.....thx!

 
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do you know the transistor's info, incase others want it?

 
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If you guys are still having problems here is an article that might help.

<a href="http://www.polkaudio.com/car/faqad/advice.php?article=noise">HERE</a>

 
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The Product to look for is made by Radio Shack. It is a Ground Loop Isolator. Just ask anyone who works at a Radio Shack for this and they will know what you are talking about. It is meant to be hooked up between the RCA's from the Head Unit and the Amp. Cost is about $15.00 per unit. I had to use 2 because I had RCA's for both front and rear speakers. Works Great Though!!!
Good Luck!