PAIR MTX JACKHAMMER JH4510-04 10" 800W Car Subwoofers PAIR MTX Jack Hammer 10" 800 WAT Car Subwoofers Polypropylene woofer cone with stitched rubber surround Impedance: Single 4 Ohms 428 Degrees High Temp 1.5" Voice Coil Frequency response: 31-150 Hz