Atlantic Technology 102SB-BLK Powered Subwoofer, Black Compact 100-watt powered subwoofer for stereo or home theater applications 8-inch, long-throw, composite cone woofer and 2-inch, high-temp, 4-layer voice coil High-current amplifier ensures powerful, controlled bass with articulation and authority 34 to 250 Hz frequency response; adjustable 40 to 140 Hz low-pass crossover Low-level inputs and outputs; 13.2 x 13 x 12.2 inches (W x H x D); 90-day warranty