2) ROCKFORD FOSGATE P2D4-12 12" 1600W Car Subwoofers Sub + Dual Vented Sub Box Rockford Fosgate Punch P2D4-12 Car Subwoofer . Size: 12 inches . Nominal Impedance: Dual 4-Ohm . Peak Power: 800 Watt . RMS Power: 400 Watt . Custom 10-AWG nickel plated push terminals . Diamond cut cast aluminum trim ring with optional grille . Dual linear spider with embedded 16 AWG tinsel leads . Extended pole piece and bumped vented backplate . High-temp voice coil with spun-laced Nomex re-inforcement collar . Kevlar fiber reinforced paper cone . Protective PVC textured magnet cover . StampCast basket with integrated spider venting . Voice Coil Diameter: 2.25 inch / (57.7 mm) . Magnet Weight: 72.8 oz / 2.06 kg . Speaker Connector: Dual 10 AWG compression . Cutout Diameter: 11.22 inches / (285 mm) . Mounting Depth: 6.40 inches / (162.6 mm) . Woofer Displacement: 0.170 cu.ft / (4.8 Liters) . Shipping Weight: 15.6 Lbs / (7.07 kg) . Fs (Hz): 27.2 . Re (Ohms): 6.40 . Le (mH): 5.5 . Qms: 6.30 . Qes: 0.59 . Qts: 0.54 . Vas (Liters): 81.5 . Sd (cm2): 570 . SPL (dB @ 1w/1m): 86 . Xmax (mm): 13.3 . Sealed Enclosure . Vb: 1.02 cu.ft. F3: 45 Hz. Qtc: 0.97. Height: 14 inches. Width: 18 inches. Depth: 10 inches. Speaker Cutout: 11.22 inches. Speaker Depth: 6.40 inches. Vd: 0.17 cu.ft. Vented Enclosure . Vb: 1.79 cu.ft. Fb: 40 Hz. F3: 35.7 Hz. Height: 14 inches. Width: 25 inches. Depth: 12 inches. Np: 1 port. Dp: 4 inch diameter. Lp: 11.8 inch long. Speaker Cutout: 11.22 inches. Speaker Depth: 6.40 inches. Vd: 0.17 cu.ft. Vp: 0.086 cu.ft. Recommended Enclosure Type: ported or sealed. Minimum Sealed Box Volume: 0.50 cubic feet. Optimum Sealed Box Volume: 0.75 cubic feet. Maximum Sealed Box Volume: 0.85 cubic feet. Minimum Ported Box Volume: 0.70 cubic feet. Top-Mount Depth: 4.57". Cutout Diameter: 9.13". Rockville RDVB12 Dual 12" 1.75 cu.ft. MDF Vented/Ported Subwoofer Enclosure Box . Dual 12" vented subwoofer enclosure. Hardwood MDF. Machine precision cut mounting holes . 3/4" USA Heavy Duty MDF Construction. Top of the line Glue for extra durable adhesion. High quality GOLD spring loaded terminals. Designed, tested, and engineered to work with most of todays popular woofers.