Need to replace that blown cone on your G3 12" subwoofer? We sell Boston Acoustics SPS G31244 Cone Assembly Replacement Kit for G3 12" Subwoofer GBX-SPS-G31244-FB. These cone assembly kits are made from high quality and durable materials. The Soft Particle System consists of a copolymer woofer cone with a raised polypropylene dustcap and a large surrounding foam. The kit features an interchangeable assembly which allows easy repair of a blown woofer or change from a dual voice coil to a single voice coil configuration.