Features 2.5" 4 layer Anodized aluminum high-temperature voice coil Non-pressed paper cone Double stitched foam surround Dual poly-cotton dampeners Die-cast aluminum vented basket Rubber gasket trim ring Large gauge compression terminals Protective magnet cover Specifications: Structure 8" (20.32cm) Woofer Dynamic Power Handling 1800 Watts Nominal Power Handling 900 Watts Impedance Dual 4Ω Voice Coil Parameters: Resonant Frequency (fs) 34.109Hz D.C. Voice Coil Resistance (Re) 2 x 3.2Ω Mechanical