2 Rockford Fosgate P3SD4-12 Shallow Mount P3 Series 12" Dual 4 Ohm Voice Coil 800W Max Subwoofers - The Rockford Fosgate P3S 12" shallow mount subwoofer delivers Punch, even in depth limited situations. Rockford Fosgate understands all vehicles are not the same, because some cannot accommodate deep subwoofers. In the past, that meant no Bass. Not anymore! Now even depth challenged vehicles can have REAL Bass and the Dual Voice Coil allow configurations for every application. Shallow woofers are specifically designed for spaces where a traditional woofer cannot be used. Features: M-Roll Santoprene surround StampCast basket with integrated spider venting Anodized aluminum cone and dustcap Dual linear spider with embedded 16 AWG tinsel leads Diamond cut cast aluminum trim ring with optional grille Shallow Motor Assembly Optimized for both sealed and vented enclosures 1 Year Warranty Specifications Magnet Weight (oz): 51 oz. (1.45 kg.) Nominal Impedance: Dual 4-Ohm Voice Coil Diameter: 2.5" (65.5 mm) SPL (dB @ 1w/1m): 85 Fs (Hz): 35.4 Qms: 5.70 Vas (Liters): 35.3 Cutout Diameter: 11.22 in. (285.0 mm) Woofer Displacement: 0.086 cu. ft. (2.45 Liters) Sd (cm2): 500 Size: 12"