Your issue is caused by your hu? That's strange. Hopefully your settings/eq are at 0 or flat. If they are, then the clipping at the amp is caused by the amplifiers settings. What amp/sub/electrical upgrades/wire size? Also what impedance is the sub(s) wired for?
Team Starr Mountain Nuthugger #4
Bought From: outsideshot23, bigguy2010, SAZCLASSD, centergod79, SPLaudio, JCRF71, Vertex Audio, assassin1840, woofercooker, double 07
Sold To: ChucklezZ, Davecub14
1998 Pontiac Grand Prix GTP Sedan: (2) C&D 102AH Trunk Batteries, Needs Big 3
Sub stage: Custom SPLaudio 12" DC Lvl 5 m1 motor Dual 2-Ohm
Box: 1.75ft^3 ported @ 31hz
Sub Amp: Cadence ZRS C5 (5,100w RMS 1-Ohm @ 14.4v)