Mr. Dj PRO3500AMP 12" 3500W Professional Series Active/Pre Amplified Subwoofer. 12" 3500W Professional Series Active/Pre Amplified Subwoofer, Bass Reflex Subwoofer Design for great Sound reinforcement and monitoring during show Rugged enclosure with multiple handle locations , Balanced XLR & 1/4'' Input / Output, 3500 Watts P.M.P.O (Peak Momentary Power Output) Subwoofer