Seismic Audio - 18" Raw Subwoofer/Woofer/Speaker - PA DJ Pro Audio Replacement Model #: Seismic Audio - Quake 18 Type: 18" Woofer/Speaker. Power RMS: 500 Watts. Power Peak: 1000 Watts Frequency Response: 35-3K Hz. Sensitivity: 97 db. Magnet: 2x90 oz. Voice Coil: 3" Impedance: 8 Ohm. Pressed Steel Chassis. Paper cone This speaker is brand new. One year warranty.