Boss Hoss
FRF Addict
Madcow--wish I could help you but my subs are installed differently with each one having a different crossover set up and amp with a gain knob installed for adjustments in the dash. Was tuned during install speaker by speaker to ensure the best sound. I run everything flat on the head unit most of the time and will tweak the bass gain on the 13.5 JL occasionally. When running at full volume on the head unit you should have no distortion or clipping. This is tough because of the different media inputs radio, satellite and CD, DVD, or IPod.
Good luck.
Good luck.