Blaupunkt GTb 8A 150-Watt 8-Inch Preloaded Active Subwoofer System 8-Inch Preloaded Active Subwoofer System 150 Watts Peak Power, 75 Watts Rated Power Spun Paper Cone Low Pass Filter: 70-200Hz Gain/Phase Control: 0.3-8V/0-180 Sensitivity: 91dB