12" Dual 2 ohm ID MAX V.4 Series Subwoofer Power Handling: Peak: 1800 watts RMS: 1000 watts Recommended Power Range: 200-1000 watts Pressed paper composite cone woofer Parabolic EPDM rubber surround Over 2" long linear excursion RaDiaToR cooling system for heat dissipation Radiant Diametric Torisonal Reinforcement High compliance suspension design Flat spider with NOMEX cloth woven tinsel leads High-temperature flat wire, flat wound voice coil Inverted dust cap with logo Powder coated alloy proprietary basket 3-1/2" peak-to-peak surround excursion Frequency response: 20-250 Hz Mounting depth: 8.15" Cutout dimensions: 11.02" Recommended Enclosure Sealed (0.65 - 1.8) cuft Ported (1.25 - 2.25) cuft tuned @35hz Nominal Impedance (IMP) Ω Dual 2 DC Resistance (Re) Ω 1.65 Resonance Frequency (Fs) Hz 26.51 Equivalent Volume (Vas) L 77.51 Electrical Q Factor (Qes) 0.63 Mechanical Q Factor (Qms) 2.96 Total Q Factor (Qts) 0.52 Peak Excursion (Xmax) mm 39 Piston Area (Sd) cm2 545.00 Sensitivity 1w / 1m 85.50 dB Force Factor (BL) Tm 13.01 RMS Power W 1000 Sealed Enclosure Suggestion cu. ft. 1.0 Ported Enclosure Suggestion cu. ft. 1.75 Displacement cu. ft. 0.14 Mounting Depth in 8.15 Outside Diameter in 12.40 Cutout in 11.02