knemo77

I think I read a thread not too long ago about somebody that could hear a wizzing sound when they accelerated and it was coming from the stereo or at least it stops when I power down the head unit. The wizzing noise increases the harder I pushed down the gas.

does anybody else have this problem or remember if there was a solution in teh previous thread?

hope that explains it.

Bullwinkle

i think you need an rf filter, or something like that. it's been years since i've had that problem and i think that's what i did to fix it.

ruizs

This is caused by a ground loop, your alternator is introducing noise into your audio system. Usually, this can be fixed by moving your ground point, better shielded cables, etc. What are the details of your setup? I.e. just headunit, head+amp, where are they located, etc...

Check out this page for more info:
http://www.audiocontrol.com/techpapers/tech1002.pdf

Oh, and please try to fix it, don't just buy one of those filters (read 'band-aid'), they will take away from the quality of your sound.

ldivinag

alternator whine.

easy fix: ground loop isolator. under $20.

real fix: find that bad ground...

man i chased a bad whine on mine. a good month long search. finally, i gave in and got a ground loop iso from walmart. $12. noise gone.

knemo77

not to savy as to where its ground but here are some pics of the set up.

it has a kenwood excelon head which i didnt take a pic of.

ruizs

The first thing you need to do is figure out where your ground is... Make sure that it makes real good contact with the body/ground, its touching bare metal, etc. Also, make sure its a solid ground, not just in the middle of some body panel.
Try removing the rca cables from the amp, and checking - if its still there, you know the head unit isn't causing it.
It helped mine when I grounded the head unit and amp at the same location, its worth a try.

And since you don't know where the ground is, I'm assuming you got this installed somewhere - they should have done the work to get rid of this, I would go complain...

ldivinag

those amps screwed onto the seatbacks????

knemo77

yup, id like to move them to under the seats or in the sidewalls of the rear. But the back of the seat is cool because its out of sight and easily to get to.

4x4Lamm

My CB does that a lot, I just turn the squelch up though.

SLC Punk

One thing that I have done in my past vehicles when I got that noise is run the power and ground cables on the opposite side of the car as the RCA cables.

Birdman

This is generally caused by a difference in the ground potential between components. Try grounding all the audio components to the same point if possible, without chaining them together. Since your amps are obviously a long way from the head unit, the best you can do is ground the amps to the same "good ground" point, and find a good ground for the head unit. If this still doesn't work, you can run a seperate wire between the ground point for your amps and the ground point for your head unit. This can help to equalize the difference.

The Genesis of Noise

SLC Punk is right as well. Always run the high power lead to your amp seperatey from your RCA cables. My amp is under the driver seat with the power coming straight off the battery down the left side of the cab under the rocker panel trim, and the RCAs go from the amp back to the head unit underneath the center console. No noise.

fastv6

another big problem could be if your audio cables(rca) cables are running to close to the power cables this will most definatly cause engine noise. it usually wont do it if the speaker wires are close to the the power wires. a rule of thumb is to run the the rca cables and the power cables down opposite sides of the vehicle.

redfox435cat

you'll eliminate the cb noise buy runing both power and ground straight to the battery

fastv6

running the ground to the battery is a very common missconception, you should always get the best ground possible with the shortest length of cable. the longer the cable the more chance to generate or pick up engine noise.