Bazooka BTA8100 BT Series 8-Inch 100-Watt Amplified Tube Subwoofer 8" Woofer With Treated Foam Surround power Output 100 Watts Max 85 Hz Low-Pass Filter Subsonic Filter (12 Db/Octave At 35 Hz) For Improved Amp Efficiency sensitivity 105 Db8-9/16"W X 9-7/8"H X 18-3/8"D2-Ohm Impedance Eight-inch bass tube with on-board 100-Watt, 2-channel amplifier Eight-inch dual voice coil subwoofer Patented tube enclosure design is optimized for "Corner Loading," for maximum bass performance Includes straps for secure mounting One-year limited warranty