Sundown Audio X-15 v3 D1 Pro 15" Dual 1-Ohm 2000W RMS Bass Subwoofer

X-15 V.3 D1 - Sundown Audio 15" 2000W RMS Dual 1-Ohm X V.3 Series Subwoofer Xmax = 30mm one-way by 70% BL RMS Power = 2000-watts Specifications: DC Resistance (Re): 3.80 Ω Resonance Frequency (Fs): 29.6 Hz Equivalent Volume (Vas): 58.9 L Electrical Q Factor (Qes): 0.40 Mechanical Q Factor (Qms): 4.65 Total Q Factor (Qts): 0.37 Voice Coil Inductance (Le): 2.53 mH Force Factor (BL): 25.6 NA Moving Mass (incl. Air Load) (Mms): 366.8 g Suspension Compliance (Cms): 0.08 mm/N Sensitivity: 87.7 dB 1w / 1m Box Recommendations: Sealed: N/A Ported:4.25 cu. ft. Displacement: 0.22 cu. ft. Depth: 10.85 in Outside Diameter: 15.51 in Cutout Diameter: 13.83 in Recommended Tuning: 32 Hz Recommended Port Area: 68 sq. in