Rockville RTB65A 6.5" 300w Powered Active Car Subwoofer Bass Tube + MP3 Input Rockville RTB65A 6.5 300W powered subwoofer bass tube with MP3 input 300 watts peak/150 watts RMS 6.5 high power woofer in vented tubular enclosure Integrated, built-in 150 watts RMS rated amplifier Rear aero vent bass system