Active 12 Inch Car Audio Subwoofer Tube Enclosure If you are looking for maximum bass response, punch and additional sub-bass kick, the Seismic Audio series of‚ Active Subwoofer Tube Speakers are exactly what you need. This 12 Inch‚ Powered Tube enclosure is equipped with a Class D amplifier, a max output of 600 watts, a 2-inch voice coil, and a rear bass vent to supply that super low-end bass. High-Quality construction and a smooth carpet finish allow this tube speaker to fit in with your existing system or replace your old one. With our series of powered subwoofer tube speakers, people will hear you coming and you can rest easy knowing you are putting out deep, hard-hitting bass. Specifications Model: SA-BPT12-A Active 12 Inch Car Audio Subwoofer Tube Enclosure | High Powered Tube Enclosure with Class D Amplifier and Carpet Finish Power Rating: 600 Watts Max Power High Powered 12 inch Woofer with a Non-Pressed Paper Cone and Specially Treated Foam Surround with Rubber Edge Suspension Voice Coil:‚ 2 inch 4 Layer Voice Coil Impedance: 4 Ohms‚ Magnet: 50 Ounce Sensitivity:‚ 91 dB Frequency Response: 25-200Hz Rear Vented Design for Ultimate Bass Response‚ Dimensions: 21.6" x 14.1" x 13.4" | Weight:‚ 30.8 lbs