Klipsch Synergy SUB-12 Subwoofer Speaker (Single, Black) (Discontinued by Manufacturer) A single powerful compact subwoofer speaker Equipped with 12" down-firing woofer and BASHamplifier FTC Rated Power: 300 watts continuous, Dynamic Power: 650 watts Frequency Response: 24Hz - 120Hz +/- 3dB Features a new industrial design that is refined and aggressive