HUM with RPM, Fuzz, and Weak Sub

Finally finished my audio install but still has a lot of work to do.

1) I've got this weird hum through the speakers that gets higher in pitch with my RPM's... my friend had the same thing happen to his car when he installed his system.

- It only happens when the radio is ON
- My truck feels like it has the AC unit on... the truck slows down faster when I let go of the gas... and a little harder to shift because the RPMs go down so quickly.

2) When the truck is off and the volume is low, the tweeters produce fuzz. How do I get rid of this?

3) My sub isn't hitting as hard as anticipated... 12" Infinity Kappa powered by a 600w Mono Pioneer Amp. Where do I start trouble shooting? The sub is facing up but I don't think that has anything to do with it. (Fuses seem to be in good shape or else the amp wouldn't work, right?)

 

The high pitched noise is called alternator whine. Try regrounding everything to a better ground point. Also, what brand is your headunit? It isn't a pioneer is it?

I really don't think there should be any effect on drivability for your truck. You might just be a bit paranoid. It happens when you change something and then think, "Oh, what was that." when it would have been normal before.

The Fuzz you hear through the tweeters is called a noise floor. Yours is audible. If you are running an amp to the front speakers turn the gain down.

 

thank you! i regrounded and the alternator whine is gone. turned the gain down, and the fuzz at low volume is gone but now is more apparent at higher volumes... i guess i need to find the mid point.

now i need to figure out my lack of bass... i think it might be a combination of my gain setting. i'll play around with it tonight.

 

Glad to help man.

 

Played around with the gain but didn't get the fuzz to go away.

I think I've ruled it out to be the IPOD FULL SPEED CABLE and here's why:

Only my front speakers are powered by the amp... rears are powered by the stereo. When I set the stereo to only the rears... there's still static. That rules out anything being wrong with the wiring of amp/speakers/tweets/crossover.

Removed the head unit, rewired the harnesses... still fuzz. When I unplug my ipod the sound goes away. Your guys thoughts?????

Here's a link to the cable type: http://www.crutchfield.com/S-Opy1NcVOtnd/p_500KCE422I/Alpine-KCE-422i-iPod-cable.html

I bought a generic one from Ebay... wonder if I cheaped out too much.