i have a 98 VTiR Civic, i have pioneer bluetooth deck, alpine type r splits in front, 6 x9's in rear, 2 fusion powerplant subs, power plant amp for subs, encounter for speakers and it hums slightly when off, when on does it louder, and as revs go up as does it, on vtech the speakers hurt ya ears from the hum, wat causes it and wat can fix it