100W BUILT-IN AMPLIFIER; DOWN-FIRING, LONG-THROW 8" SUBWOOFER; FREQ RESP: 38 HZ–180 HZ VARIABLE ; S/N RATIO: > 80 DB ; DEEP ROBUST BASS IN AN 11" CABINET ; ADJUSTABLE CROSSOVER, AUTOMATIC ON/OFF SIGNAL SENSING ; BLACK LAMINATE FINISH ; 7-YEAR LIMITED WARRANTY; EACH