Thigpen Rotary subwoofer

Rotary woofer display

Articulated blades

Opening into listening room

Close up of grill, damping material and internal bracing for manifold

This is the operational woofer and the manifold in the adjacent room

Close up of the demo woofer 

3 phase controller for the woofer motor

Bruce demoing by pressurizing the room with a 2 Hz tone

Baby version of the woofer