10"/12" Amplified Bass subwoofer Box 2"Voice Coil, PP Cone With Rubber ... Max Power:300W Sensitivity:90dB CB250-1BXA10" Amplified Bass subwoofer Box10" Woofer ,40 OZ Magnet2"Voice Coil, PP ... SurroundMax Power:300WSensitivity:90dBFrequency Response:50-250HzCB300-1BXA12"Amplified Bass subwoofer Box12"woofer ,40 OZ Magnet2"Voice Coil, PP ... 50-250Hz Boss Electronics 10" /12" Sealed Bass subwoofer Box