Well I just added a 300 watt kenwood 4 channel amp to my 95 SE for my mids and highs, but now, there is some weird whining/high pitched niose that comes from my speakers, and its in unison with my engine. By this I mean, the higher the RPM the higher the noise. Why does this happen? Is there somethign wrong with the wires? Any1 have this problem, sometimes when my amp for my bass had its ground wire loose, the bass wouldnt' work and the noise began to start, but thats when the ground wire was off. I get this noise when everything is working. Thanks for your help in advance.

 

It's alternator whine, check the grounds and also on any other electrical accessories you may have to ensure they have decent grounding...it is feedback being transfered thru your sound system, very common and if checking grounds does not fix it, consider filters to get rid of some of the noise, available commercially...good luck

 

Yeah i figured it would be some kind of wire transferring some weird signal to my speakers. I'm going to go check the wires and make sure everythign is ok. My speakers were fine with just my amp for bass. I was also told to buy some noise filters but they are $15 a piece. Thanks for the help.

 

Are you useing the same amp that you were using for bass, I mean a sub? Or is this an amp that you just installed? You will have to make sure the wiring is sufficiently large enough for the power need of the amp. Next I would check the wires that deliver the music signal to the amp. Normally this is an RCA cable. Cheap cables can be noisy if they cross power wires or other noise sources.

 

Well, i had 4 gauge wire going to my 2 channel amp for my bass, but now that I added my 300 watt 4 channel amp, I used a splitter. 4 gauge goes in, and two 8 gauge wires come out. Its suffieicent cause none of my lights dim or anything. . I ran the speaker wire and the RCA on the same side of the car, and the power amp cable on the other side. The ground is comming from the back seat so its right there, I know all the wires at the end are somewhat close to each other.

 

I had a similar problem, and i dont mean to jump into this thread and cause trouble, but grounds are extrememly important. I used a dremmel, to strip the paint then drill a whole in the bottom of my trunk. So if you're using 2 8's as a power supply, make sure you have at least 8's for your grounds. Maybe even pump both grounds up to 4's.

 

My ground is also 4 gauge wire. If the ground is not "big" enough, could that cause the noise from teh speakers?

 

Possible, but you also want to ground both amps to the same point. The 8 gauge wires going to the positive input may be too small, what is the size of the sub amp? But I think we may still be forgetting something. Is it possible the 300 watt amp is in contact with the car? This could also ground it out and make noise. Unless it is internally wired like the Precision Power amps which are unaffected by this.

 

Your ground should NEVER EVER be more than 2 ft long, no matter how thick a gauge. I ground my two amps using 4 gauge 13" long each.

 

Why is it bad to have a ground that is more than 2 feet long? What happens if it HAS to be mroe tha n2 feet because of the position of the amps in the car. My bass amp is a 800 watt pioneer 2 channel, and my mids/high amp is a 300 watt kenwood 4 channel. Both mounted on opposite sides of the subwoofer box.

 

Because when the ground is longer than 2 ft, the majority of the time, you end up with problems like noise, whether, static or engine. If you want to mount your amps on opposite sides of the box, that's fine, just make sure the ground wires are as short as possible, and grounded properly, i.e. find a good ground point, grind off the surface, ESPECIALLY if it is painted, make sure you use the appropriate connector to ground to the car, and then use a good dielectric grease, or even something as simple as a spray or two of Rust Chek. If you must, use a blade to cut a small hole in the carpetting to thread the wire between the amp and the ground point.

 

Good call, Sin.

 

"use a good dielectric grease" - vaseline!

 

I was thinking KY jelly