DESC: Brown Injected Polypropylene Cone Specially Treated Black Rubber Edge Suspension Bumped & Vented Motor Structure High temperature Kapton Voice Coil Heavy Magnet Structure 4 Ohm Impedance Size 10' Peak Power 500W RMS Power 250W Voice Coil 2' KSV SPL @ 1W/1M 88 dB FS (HZ) 39 QMS 2.09 QES 0.91 VAS (cu ft) 1.781 Overall Diameter 9.61' Mounting Depth 4.33' Magnet Weight 80 0z