Ive tried 2 differnt grounds and the 2nd is better then the first, but it still taps my subs and still has a humming noise. right now its nto a big deal but in a couple days i want to power my 6x9s of an amp and i tried it already, when i turn it on full then the humming noise is outrages so i need to get ti fixed. so can someone give me all the possabliltys to fixing the humming noise. ppl r saying its my rcas but i tried regrounding them by attaching a wire to each and grounding it, and it stays the same so its not the rcas.