i know my stereo is wired completely wrong, but everything works properly. My truck is a 3.0L 5speed 1988 4runner with a SAS, and once in a while when the RPM's go over 2000/rpm i can hear a buzzing in the tweeters or the subs or something, and gets higher pitched as the motor speeds up.

Could it just be a bad ground wire or what could my problem be? im planning on redoing all the wiring soon, but for the time being i want to fix this problem.

Any stereo guys know whats wrong?

 

where are you getting power and ground for the radio? generally the noise comes from the alternator, depending where you get the power for the radio it may pick up noise

 

You are getting electrical interference from the ignition.
Most car stereo shops sell filters that help reduce this.

 

you may have a power wire ran to clse to a speaker wire or rca cable

 

typically referred to as "engine noise".

Try looking for a better ground first.

 

bingo

 

x3...

 

i'd have to say they are all three right. when i wired up my amp i bought one of those little kits (yes im electronically illiterate) and it specifically said to avoid running a power wire near the rca cables

 

I was in the high end car/home audio business for several years.
I did everything from car installs to running the place.
Just about all electronic ignitions produce some amount of RF.
That whining sound that increases with RPM is a common symptom of interference from electrical ignitions.
It is especially apparent when you add amplifiers.
Shielded RCA cables and a filter should do the trick.
If he was running 12v to the speaker he would be hearing something completely different, would also be smelling something burning...

 

or do this take the rca's from the back of the radio strip them take a wire around the outer wire and put it to ground there you go its a installers trick hope you like

 

Run the Power and Remote wires together, Then run the RCA's on the other side of the vehicle. Also make sure you have a very good ground source.

 

to add, a clean power source (as close to (or directly to) the battery as possible.

fuse it by the battery and before the head unit/and amp.
i run my stereo on an isolated post on the battery itself, and every ground is less then 5 inches, to a bare metal surface (w/sandpaper) and then coated w/paint after securing said grounds.

never heard a buzz since ive been doing this.
also, to help w/dimming lights, try a capacitor (1.5fared is enough).

keep it simple, and keep the fuses in a convenient place *(i now use circuit breakers).

 

X2

jason

 

x3 you should never run rca and power together. That cause noise.

otherwise, I think it is the alternator whining