I was just wonder what could cause whining noise thru speakers/subs when i accelerate and decelerate I think it has to do with the stock ground to the battery b/c whei hook 1 amp up it works fine but when both my phoenix gold xenon 1200.1 and alpine v12 mrv f340 is hooked up they both whine. The whine on the subs is very low but i would like to get it fixed anyone have an exact solution (besides ground loops isolaters) ? I have my car going into a car shop so they can do a 0 gauge ground to my battery hopefully that will fix it

 

The crossover on the PG amp should not allow whine to go to the sub...

 

it does but its ver y low so im assuming its the ground ?

 

whining noise can also be caused by gf sitting in passenger seat or one of her friends in the back seat, just tell them to shut up and it should be ok! oh please note, you may have to look for a new gf after you pull this stunt! but hey at least the whining is gone!