PAIR MTX JACKHAMMER JH5512-04 12" 1600W Car Subwoofers PAIR MTX Jack Hammer 12" 1600 WATT 4 Ohm Car Subwoofers 800 WATT MAX (1600 Watt PAIR) and 400 WATT RMS (800 Watt PAIR) 428 Degrees High Temp 1.5" Voice Coil and Rubber Surround ALDS Asymmetrical Linear Drive System with a flat progressive spider and extended pole Frequency response: 31-150 Hz with Sensitivity: 86.7 dB