just installed new h/u and speakers and i got major whine in radio and aux (sat) but cd is almost perfect tried moving grounds and grounding h/u and unt and stuff live that any suggestions?

 

Does it do it all the time? Or only when the engine is on.....Does get higher pitched when the rpm's go up?

 

sounds like you are using a docking Sat radio?
If so check & see if the Audio out/Aux is plugged in all the way..

 

it gets louder when i step on it, its alternator whining noise

 

So only when the radio or Sat Radio is on? Hmmm there is an off chance that the radio wire is grounding somewhere or picking up interference from a point in the wire where it is exposed... With the Sat radio... Definitely check your ground as well as how close you are running your signal wires or RCA's to any large power wire. Also go over the line and make sure that there is no cracks or exposures in the wire

 

http://www.davidnavone.com/

This is the best resource for car audio noise solutions.

 

Great suggestion David is the best and you get 1 on 1 personal advice and support from him!