The bottom of the cabinet sits on a sand filled base–whats going on with the rest of the cabinet?
The base of the cabinet is a hollow chamber filled with approx. 15 lbs. of sand. This helps to bleed off excess energy from the rest of the cabinet and dissipate it. But it doesn’t bleed off all the energy created by the back pressure from the woofer, because if it did the sound would be something other than musical. Thus the cabinet is somewhat of a dichotomy: the bottom half bleeds of energy, and the top half lets energy from the cabinet become part of the subwoofer’s sound. The cabinet, while very solidly constructed from 3/4″ MDF, flies in the face of conventional wisdom yet again by using no internal bracing. The concept here was to do a balancing act where the cabinet is somewhat inert, but not so inert as to be sonically bland.
