SUNDOWN AUDIO X-10 V.2 D2 REVISION 2 PRO 10" DUAL 2-OHM 1500W RMS SUBWOOFER NEW Specifications: DC Resistance (Re): 3.80 Ω Resonance Frequency (Fs): 38.2 Hz Equivalent Volume (Vas): 9.0 L Electrical Q Factor (Qes): 0.53 Mechanical Q Factor (Qms): 4.93 Total Q Factor (Qts): 0.48 Voice Coil Inductance (Le): 2.56 mH Force Factor (BL): 24.8 NA Moving Mass (incl. Air Load) (Mms): 356.4 g Suspension Compliance (Cms): 0.05 mm/N Sensitivity: 81.6 dB 1w / 1m Box Recommendations: Sealed Enclosure Suggestion: Not Recommended Ported Enclosure Suggestion: 1.50 cu. ft. Displacement: 0.21 cu. ft. Depth: 8.88 in Outside Diameter: 11.65 in Cutout: 10.01 in Recommended Tuning: 32 Hz Recommended Port Area: 24 sq. in