Hey guys,
I have a '99 Prelude SH, and I'm running 2 10" Rockford HE2's with 2 Rockford 451s Amps, and right now I have all stock speakers and headunit, and I'm taking my amp input from the rear deck speaker leads via a line-level converter. The problem is, whenever I turn on the subs, the still get the signal and everything from the radio, but they give me this loud hum, and it doesn't matter what volume the radio's at, or how the balance/fade is configured. To make matters even weirder, if I open the trunk with the subs on, the humming stops... Now, the Prelude has the accustic feedback system, so I don't know if that has anything to do with it, but help me out here!