Sedona active subwoofer enclosures are an "all-in-one" solution when adding bass to a factory or upgraded audio system. Each Sedona enclosure is manufactured with industrial grade medium density fiberboard (MDF) and wrapped in premium black upholstery. A complimenting class D amplifier is flushed into the back of each enclosure, with variable crossovers and bass boost. Select 12″ enclosures include a horn loaded port for maximum output.