when I push the volume i get respectable bass but not earth shaking like you would think... any ideas?

I've got the denon set to yes for sub
I have crossover at 120 (but tried them all really)
Power is set to max... and i'm really not impressed.

I know it's my settings/lack of knowledge... I was just hoping ot have it pumpin' for the party tonight.

- Majik

Epic 80 system
Ep 800
Denon 3808
Optoma HD20
PS3
vp180
extra QS8s (to come soon)