Alright well ive had a problem for ever with ground issues i think.(idk if thats the real prob.). Ok so ive always had turn on thumps from the radio turning on and it went from that with my old deck to when my volume is at 0 when i turn it up it thumps just once or initially. I have relocated my ground again and again and again etc.. Well i cannot figure this prob out. Aside from the thump from volume 0 to 1 i have an engine noise like its not alt. Whine it almost sounds like my speakers are acting like my muffler. Its not loud but its noticable when setting still and music real low. The prob stops when hu is off or at 0 volume. Any ideas its not my rcas ive tried mutiple pairs. theres no power wire close, all power and rcas are on diff sides. I am no NOOB im not saying im a pro if i was i wouldnt have this issue. Any ideas ppl? Thanks in advance. O btw i drive a 2000 camry