3 Piece Flat Panel Design Subwoofer & Satellite Speaker System...Thunderous bass response! That is what you notice right off with this speaker system. It is a 3 piece (2.1) set utilizing an 5.25" woofer with a long throw voice-coil and tuned port to further enhance the response. Our new flat panel type satellites with dual 2" super radiators balance the performance for a full audio spectrum response.