Kicker Weatherproof Sealed Subwoofer Box w/ 8" Subwoofer 46CWTB82Compact enclosure, powerful bass Whatever kind of music you like, you need a good subwoofer to make it sound great. When you also need to keep your cargo space, you need a powerful, compact solution. Kicker's 46CWTB82 tube subwoofer gives you window rattling bass and impressive power handling in a surprisingly small package. The enclosure includes a 8" subwoofer and a second passive sub (called a "passive radiator") which reacts to the air pressure