Rockville RTB12A 12" 600w Powered Subwoofer Bass Tube + Bass Remote Rockville RTB12A 12 600w Powered Subwoofer Bass Tube With Bass Remote. 600 Watts Peak/300 Watts RMS. 12 High power woofer in vented tubular enclosure. Integrated, built-in 300 Watts RMS Rated amplifier. Rear aero vent bass system. Speaker level and RCA line-level input. Frequency response: 30Hz-200Hz. Sensitivity: 111 dB. Adjustable bass crossover. Dashboard adjustable bass remote control. Molded steel woofer grill. Four steel mounting brackets + two canvas straps with Velcro fasteners. Tube is covered in durable aviation grade tweed with embroidered logo. Dimensions: 12.75 x 22.83. Rockville RTB12A 12 600w Powered Subwoofer Bass Tube With Bass Remote. 600 Watts Peak/300 Watts RMS. Rear aero vent bass system. Speaker level and RCA line-level input. Frequency response: 30Hz-200Hz. Sensitivity: 111 dB. Adjustable bass crossover. Dashboard adjustable bass remote control. Molded steel woofer grill. Four steel mounting brackets + two canvas straps with Velcro fasteners. Tube is covered in durable aviation grade tweed with embroidered logo. Dimensions: 12.75 x 22.83.