... sound system,power amplifier,loudspeaker,subwoofer, micphone, pro audio 15 inch speaker CBX-215 , box sound system ,pro fessional ... professional vocal sound system. professional bass speaker 99db SPL 15 inch pro audio speaker CBX-215 Features:*A unique polygon ... for exceptional high-frequency reproduction.*Extremely powerful and strong woofer delivers deep bass and acoustic power.*Ergonomically shaped ...