Need audio help!!
Thread Starter
Burning Brakes
Joined: Oct 2003
Posts: 972
Likes: 0
From: Birmingham Alabama
Need audio help!!
Here's what I've got:
I'm getting some sort of interference from the rears. Installed Polk DB6500 components in the front, DB525's in the back, and a JL stealthbox for a sub. Speakers powered by a kicker 350/4 and sub by a 250. Also used a PAC oem24 module and retained the factory head unit. Now, only the rears make noise when the volume is turned down. We tried different speakers, amps, cabling, but nothing would get rid of the noise. Any ideas?
I'm getting some sort of interference from the rears. Installed Polk DB6500 components in the front, DB525's in the back, and a JL stealthbox for a sub. Speakers powered by a kicker 350/4 and sub by a 250. Also used a PAC oem24 module and retained the factory head unit. Now, only the rears make noise when the volume is turned down. We tried different speakers, amps, cabling, but nothing would get rid of the noise. Any ideas?
Drifting
Joined: Feb 2006
Posts: 1,250
Likes: 3
From: Honolulu HI
Grounding??!!
make sure you run a ground to a good location...
(since your amps are big... i would run a ground to the battery)
what kind of noise are you hearing?? whining? static?
I'm assuming the power for the amps are from the battery also...
make sure you run a ground to a good location...
(since your amps are big... i would run a ground to the battery)
what kind of noise are you hearing?? whining? static?
I'm assuming the power for the amps are from the battery also...
Drifting
Joined: Feb 2006
Posts: 1,250
Likes: 3
From: Honolulu HI
seems like you have some alternator noise - you can get filters for that.... most stereo shops sell them
without hearing sound it would be hard to tell someone exactly what they would need...
getting rid of the noise is almost a "try here... if not... try here" kind of solution.... so....
try the amp power lines first (alternator connection)...
filters in signal line next (above should take care of most noise)...
grounding for amps should be at the same location (make sure it's good - i haven't looked into how the chassis is built and grounding for the Vette - i would think it's different than a regular "all metal" car)
for troubleshooting just run a wire for ground if your not sure (from batt to amps - outside car)
good luck!!
without hearing sound it would be hard to tell someone exactly what they would need...
getting rid of the noise is almost a "try here... if not... try here" kind of solution.... so....
try the amp power lines first (alternator connection)...
filters in signal line next (above should take care of most noise)...
grounding for amps should be at the same location (make sure it's good - i haven't looked into how the chassis is built and grounding for the Vette - i would think it's different than a regular "all metal" car)
for troubleshooting just run a wire for ground if your not sure (from batt to amps - outside car)
good luck!!
Le Mans Master
Joined: Jun 2004
Posts: 9,289
Likes: 16
From: Skippack PA
St Jude Donor '13
It really does sound like a ground problem, #1 gremlin in all auto sound installs. Here's where we connected my ground cable, passenger side panel toward the rear of the cabin:
We scuffed the panel to make sure the ground connection was being made on more than just the bolt itself, then after we connected it up sprayed some undercoat over it to seal it back up.
Have you tried swapping the inputs on the amp and swapping the amp outputs to see if the noise is from the amp itself or the head/PAC ?
We scuffed the panel to make sure the ground connection was being made on more than just the bolt itself, then after we connected it up sprayed some undercoat over it to seal it back up.
Have you tried swapping the inputs on the amp and swapping the amp outputs to see if the noise is from the amp itself or the head/PAC ?
