X-18 V.3 D2 - Sundown Audio 18" 2000W RMS Dual 2-Ohm Xv.3 Series Subwoofer

Specifications:
DC Resistance (Re): 3.80 Ω
Resonance Frequency (Fs): 26.4 Hz
Equivalent Volume (Vas): 154.0 L
Electrical Q Factor (Qes): 0.44
Mechanical Q Factor (Qms): 5.16
Total Q Factor (Qts): 0.40
Voice Coil Inductance (Le): 2.71 mH
Force Factor (BL): 25.4 NA
Moving Mass (incl. Air Load) (Mms): 449.0 g
Suspension Compliance (Cms): 0.08 mm/N
Sensitivity: 90.0 dB 1w / 1m

Box Recommendations:
Sealed: N/A
Ported: 7.00 cu. ft.
Displacement: 0.23 cu. ft.
Depth: 10.25 in
Outside Diameter: 18.42 in
Cutout Diameter: 16.69 in
Recommended Tuning: 32 Hz
Recommended Port Area: 112 sq. in