DB Drive WDX15G3.4 15" Subwoofer 4000W Max

Outside Diameter  15.71″ (399mm) Cutout Diameter  13.74″ (349mm) Mounting Depth  8.56″ (217.5mm) GENERAL SPECIFICATIONS Structure 15″ (38.1cm) Woofer Dynamic Power Handling 4000 Watts Nominal Power Handling 2000 Watts Impedance Dual 4Ω Voice Coil PARAMETERS Resonant Frequency (fs) 34.76Hz D.C. Voice Coil Resistance (Re) 2 x 3.2Ω Mechanical Quality Factor (Qms) 4.74 Electrical Quality Factor (Qes) 1.00 Total Quality Factor (Qts) 0.83 Equivalent Air Volume to Cms (Vas) 56.7 L Mass of Diaphragm/Coil (Mms) 361 g Force Factor (Bl) 22.5 Sound Pressure Level (SPL) 85.6 dB   3.0″ 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