I put my subs and everythign in, and there is SOOOOO much airspace, lol. I tested it out at level 15 (normally listened to my 9500s at 45/62) gains and everything low and I just about had a heart attack. I have to break them in for 15-20 hours, and they are already loud as hell. Even when you can't visually see them moving, you can feel the bass in your hair, lol. This is gonna be rediculous when I play it full tilt. I wonder if I'll be able to do a hair trick, there is a LOT of airflow around 35hz. The subs are just barely moving.