The Rockford Fosgate P2 15"" subwoofer continues ""The Punch"" tradition, The P2D2-15 features a Dual 2-Ohm voice coil, 400 Watts RMS power handling, and can accommodate a grille insert using the included cast aluminum trim ring, Dual linear spider with embedded 16 AWG tinsel leads, Custom 10-AWG nickel plated push terminals, Extended pole piece and bumped vented backplate, High-temp voice coil with spun-laced Nomex re-inforcement collar, Protective PVC textured magnet cover, Kevlar fiber reinforced paper cone, StampCast basket with integrated spider venting, Diamond cut cast aluminum trim ring with optional grille, Specification:, Size: 15"", Nominal Impedance: Dual 2-Ohm, Power Handling (Watts RMS): 400 Watts RMS, 800 Watts Max, Voice Coil Diameter: 2, 25"", Magnet Weight (oz): 72, 8 oz, Speaker Connector: Dual 10 AWG compression, Fs (Hz): 20, Re (Ohms): 3, 30, Le (mH): 3, 4, Qms: 6, 40, Qes: 0, 69, Qts: 0, 62, Vas (Liters): 219, 6, Sd (cm2): 894, SPL (dB 1w/1m): 86, Xmax (mm): 13, 3, Woofer Displacement: 0, 170 cu, ft, Cutout Diameter: 13, 9"", Mounting Depth: 7, 34"", SKU: TBALL9862