Hi all, so heres the set up Im running a pioneer FH-XT720BT, HIFONICS BRUTUS ELITE 1700.1D, TWO S12L74, installed in a custom box 1.0cft from soundoff audio in 08 silverado crew cab. the subs are downward firing and are wired at 1 ohm tested with voltage meter. So can someone please tell me why...