U-15 D4 - Sundown Audio 15" Dual 4-Ohm 1500W RMS U-Series Subwoofer
SPECIFICATIONS:
DC Resistance (Re): 6.1
Resonance Frequency (Fs): 34.9 Hz
Equivalent Volume (Vas): 63.9 L
Electrical Q Factor (Qes): 0.39
Mechanical Q Factor (Qms): 3.48
Total Q Factor (Qts): 0.35
Voice Coil Inductance (Le): 3.80 mH
Force Factor (BL): 34.6 NA
Moving Mass (incl.
Air Load) (Mms): 353.0 g
Suspension Compliance (Cms): 0.06 mm/N
Sensitivity: 90.2 dB 1w / 1m
Box Recommendations:
Sealed: 2.0 cu. ft.
Ported: 3.0 cu. ft.
Displacement: 0.24 cu. ft.
Depth: 9.05 in
Outside Diameter: 15.59 in
Cutout Diameter: 14.01 in
Recommended Tuning: 32 Hz
Recommended Port Area: 48 sq. in