What can I do about that terrible whistling noise that comes through my stereo when the engine revs up. I have two mtx 5000's with a 600 watt profile amp. I put a 1 farad rockford fosgate capacitor on it hoping it would help. It did a little, but the noise is still there. Anyone, please help.

Choose a better ground for your amps and your radio, for the amp i suggest the seatbelt bolt behind the drivers seat... you might wanna grind it a bit to get a good contact to metal....

if that fixes it great, if not experiment with different ground locations for the amp and head unit, but always make sure your grounding to bare metal.

OH AND RCA wires run on passenger side while POWER on drivers side, dont run em down the same track.

I tried getting a better ground, to no avail. Also the place I had the stereo equipment installed at ran the power and rca cables together. I have already yanked the rca cables out and put them on the other side. Is there possib;y anything else or should I just mess with the ground and see which location causes the least amount of noise?

get something called a ground loop isolator....that should fix it...get it at local best buy

You shouldnt need a isolator if its grounded correctly....

btw, opt for a better amp profile is on the lines of like a pyramid amp imho...


This post has been edited by DmVinny: Apr 5, 2004 - 1:53 AM

Make sure your ground and your power wire are running seperately to the amp.

Also, if your rca's and remote wire for the amp are near each other you will get noise.

-bufferdan+Apr 5, 2004 - 2:54 PM

Yes it will..depends if the rca's are shielded or not. I just ran the rca's and remote together and i was getting tons of whin through the speakers. I switch the rca's to the other side and it totally went away.

If the RCA's and the POWER wires are together it will make a diffrence, if your RCA's and REM wires are together it wont do anything

Make sure u run power and signal wires on different sides of car

Make sure that you ground wire is at least equal in guage size to your power wire

Make sure you ground as close to the as possible

the most important thing is to get a new amp because profile sucks!!!

William

DUDE..it can! MY power wire is ran under the car. I ran the rca's and the remote together down the drivers side. I was getting major engine noise. I switched the rca's to the passenger side and the noise completely went away... The remote wire is somewhat of a power wire anyways.. It sends a charge to the amp to tell it to turn on whenever the headunit turns on. It will interfer if the rca's arent shielded.. I know for a fact..I proved it to myself.

-bufferdan+Apr 5, 2004 - 6:00 PM

The person that had the car before me did the power wire under there..i dont go that route but i just left it that way... The problem was the rca and remote being together. Those are the only two wires i switched to get rid of the engine whine though the speakers. If you have triple shielded rca's then you probably wont have any problems.

Okay, one more thing to think about... During the day I don't get any whine, but when I have my lights on, accesories going, etc. that's when it happens. Is all the above legit reasons. Just too much amperage being pulled through the lines or what? BTW: I think my ground, power, and remote are all run pretty close together. I'll check that out when my car gets out of the paint shop. Thanks for the help everybody. >>

Could be that your signal cables are passing some other power cable inside the dash ? Try to follow the cable from the amp to the HU... There might be some car electronics that is ****ing with you >>

im not entirly sure but your it could just be your amp picking up everything from the engine and that in turn amplifys it through the wires and you hear it through your speakers >> . a solution would be to sheild the amp from all interior interference which seems to be what your problem is. Aslo sheilded wires will definetly help rid external noise transferring to the amp as well. just my .02

Before you go crazy checking all of you wires.

Start the car and turn on the lights. Make sure you hear the noise. Then unplug the rca's from your amp. If the noise stops it's either coming from the rca's or the radio itself. If you hear it with the rca's out regrounding the amp should fix it.

If the noise stopped. Plug the rca's back into the amp and disconnect them behind the radio. Still hear it. Re-run the rca's, think about a good quality shielded set of rca's.

If you had no noise with the deck unpluged. Try grounding your deck somewhere other than the stock ground. I've seen some crappy grounds from the factory. Just get a piece of wire hook it up as a temp and try a few different grounds.

Let me know if you still have noise with a new ground. I have a few more tricks.

I've never seen rca's and remotes run together that caused a problem. Ususally it's rca's too close to wiring harnesses or computers that cause a problem. If you do need to cross a power cable or wiring harness try to do it at a 90 degree angle, you will be less likely to induce noise.

Ground loop isolators do work but at a price. Use lose some clarity and signal strength. I try to save them for a last resort.

This post has been edited by AudioFreak: Apr 7, 2004 - 10:48 AM