high pitch noise from Rockford amp?

chertel · Post by **chertel** » November 20th, 2006, 2:09 pm

I have a rockford amp and when I start the car there is a annoying high pitch squeal from the amp then it goes away after a few minutes? I checked all the grounds and everything is good. I thought maybe it was because of the cold weather but last winter it worked great.
any help, ideas

thanx

Vanished · Post by **Vanished** » November 20th, 2006, 7:45 pm

does it have a fan?

jschrauwen · Post by **jschrauwen** » November 20th, 2006, 9:50 pm

Have you changed your ground between last winter and now? Sounds like maybe a ground loop problem. DO NOT ground your amp back to the battery. Use the same gauge wire that's powering the amp to run the shortest ground lead possible to a solid frame connection point.

chertel · Post by **chertel** » November 23rd, 2006, 11:18 am

It is the P600Ibd rockford punch mono. It's all chrome and lights up a red rockford logo if you have seen that style before? I dont think it has a fan? I will try a shorter ground wire if I can relocate the amp because it is mounted on top of the sub box now so a longer ground wire is needed. Thanx for the help. It is freezing here in edmonton now so I have to wait for it to warm up before I play with it.
Another question, other than the anoying sound will it hurt anything else if I still use it before fixing it? Because the sound goes away after the car warms up.
thanx

chew* · Post by chew* » December 5th, 2006, 12:53 am

Try running your rca wires down the opposite side of the the car that the power wire is on. If that doesn't work i suggest using a higher quality rca cable.

superman_t11 · Post by **superman_t11** » December 8th, 2006, 2:50 am

i ahd the same problem, my rca wires were loose. try checking those it was a simple fix

chertel · Post by **chertel** » December 11th, 2006, 7:54 pm

I'll check the connection to the cd player, the connection to the amp is good. They are rockford rca wires but dont look like the greatest quality. I had a set of phoenix gold rca wires on my last car that were of much better quality. I think I'll just upgrade the rca's. Thanx. I think thats the problem, yesterday as I pumped the brakes the sound went +- with the pumping of the break and now that the weather has warmed up a little the sound is not as bad and goes away after a short while. Probably poorly insulated rca's.
thanx
chris

Cy · Post by Cy » December 11th, 2006, 8:43 pm

Easy fixes...

-Move the wires to the opposite side of the car
-RCA ground loop isolator
If nothing else
-Higher quality shielded RCA Leads