Superb performance and build quality from this Studiomaster 15 inch active subwoofer system. An ideal powered sub speaker for live band PA and for use as a DJ subwoofer. This rugged and powerful sub speaker unit offers immense bass reinforcement from it's 400W RMS / 800W Max Class D power amplifier and dense plywood cabinet, with bass capability down to 30Hz for a real subsonic sweep. Coated with a durable black textured resin, the large side handles and trapeze shape construction make this active subwoofer as easy to lift as a unit of this type can be. For easy integration of the subwoofer into existing PA speaker setups, the rear panel provides you with balanced XLR inputs, full range linked outputs, and 100Hz high pass filtered outputs for use in sub/top arrangements, which is aided with the inclusion of a 35mm top hat mount for speaker pole use. The Studiomaster Drive 15SA Active Subwoofer Speaker 800W is a fantastic professional powered sub that offers affordable performance and lasting reliability.