I just rewired my whole sterio unit (In my 67 ford f-100) to my 2 amps and now i have static when i listen to anything. I have a Sony Head unit with Fosgate 5 1/4 components. Along with that i have 3 subs. 2 MTX 10 inch and 1 Fosgate 12 inch. I have the subs running off a kenwood 300 watt amp. My components are running off a little rockwood 200watt amp(payed30 bucks for it) its cheap but worked on the subs). The components are the ones you can hear messing up. I will accelerate and you can hear in the background of the speakers a pitch go up. And you can occasionally hear static. But my 12inch Fosgate you can hear it skipping too. Like it will hit good and them backfire after the base is over. This is the first time It has happened. Not a big problem it goes in and out. Do I need a better battery due to the static or the noises or what. The antenna is good. any suggestions
Thanks
Gary

 

There is one thing that a lot of people don't realize about amps, that is most people look at how many watts that an amp can put out as the way to judge its quality. Most people never consider the quality of the components running the amp. This probably accounts for the problems that you are having with your smaller Rockwood amp, the static and change in pitch. But, this is not all the amps fault; you could put the best 4-channel amp out on the market, Phoenix Gold ZX475ti, in your truck and most likely notice a little change in pick. I say this because the age of your truck. In your age vehicle, as the RPMs increases, so does the amount of electricity put out by your distributor, everything in your truck is mechanical. That would account for the increase in pitch. The static is most likely in relation to the quality of the electricity produced by your truck, meaning that there is a lot of noise in the electricity, a lot of fluctuations in the electricity. The best thing to do would go to your local car audio dealer and see if they have some way of filtering these disturbances. Don't waste your money on a new battery it is not the problem. While you are at the car audio place, have them check the way that you wired up your Fosgate sub to your Kenwood amp. Because if you have two of your channels going to that sub, trying to boost the amount of power going to it, you have messed around with that whole 4-ohm thing that you keep seeing on your amp and sub. The amp should not have a problem with that, but I am almost positive that you sub would. Oh yeah, one thing that car audio manufactures seem to forget to tell you is that when there components are not installed by certified personal, your warrantee is either shortened or in some cases non-existent.

 

make sure everything is grounded at the same point. Run the ground wire from your stereo head unit down to the amps. Then tie each amp and radio ground together when making the chassis ground connection.

 

First thing to fix is to make sure your power wires and speaker wires are run at least 8" apart throughout the vehicle. The sound is actually from tha alternator, it put out an AC current in conjunction with its RPMs. Also go to radio shack an buy a noise filter, they have a capacitor in them that helps to counteract the AC noise. Quality amps do work much better, But this might save you some money.

 

I got rid of most of the noises, but they are still there. The real problem is now my left speaker thumps every time the radio is on. Anyone know where the problem is? I checked the amp and the settings are all the same as before. Could it have somethin to do with the speaker being bad or the filter re directing the power to only one side if possible or what?
Thanks
Gary

 

Hi there
Well I can tell you it is not the age of your truck and you don't have to have everything grounded to the same spot but the last one may be some what close. Yes your power wires can give you engine noise but more likley through your rca cables ,but, there also may be other problems. One may be poor ground on the head unit. Two may be poor quality or unshielded rca cables . Three, separate your power wires and rca's. Four could be a ground loop at your amps, Is your amp screwed directly to the floor? If so take some of those little grommets you use to run wires through your fire wall etc. place them in the screw holes and run the screws through those to screw the amp down or screw the amp to piece of plywood and screw the plywood to the floor.As for the sub acting funny just make sure your speaker leads aren't touching and never,never solder your speaker terminals because that can also cause some wierdness.
any questions just e-mail me at _finetuned at excite.com
tonka