KICKER COMP VT SUBWOOFERS Comp VT Subwoofers from Kicker has a ventless, solid-pole design that allows them to be mounted directly against the rear wall of a sealed or vented enclosure, permitting the CVT8 to perform with a mounting depth of less than 3-3/8 inches, and the CVT65 with less than 2-13/16 inches. The cone's modified spoke design, 360-degree back bracing, and ribbed Santoprene® surround, the CVT becomes another KICKER subwoofer bound to shake the car audio world.