The human ear can perceive bass notes as low as 16 Hz. Notes between 16 Hz and 4 Hz are perceived through the sense of touch. And notes between 1 Hz and 4 Hz are sensed directly by the human butt. So pick up some Bazooka subwoofers and get your booty bouncing.
Bazooka official site
Who's gonna have the best sounding car (or boat) in your area? You are!