BRAND NEWSUNDOWN AUDIO M15D2M-SERIES | 15-inch 4000 Watts Peak Dual 2-Ohm Voice Coil Car SubwooferKey Features:2000 Watts RMS / 4000 Watts PeakDual 2 Ohm ConfigurationMega Roll Surround and FrameEtched All Black BackplateQuad Stack Magnet StructureSpecifications:RE (Ohms): 4.11FS (Hz): 28.567VAS (L): 43.385Qes: 0.705Qms: 5.233Qts: 0.622Le (mH): 3.645BL (NA): 23.7995Mms (Grams): 541.082Cms (uM/N): 57.363Sensitivity (dB @ 1w/1m): 83.3097Xmax: 35mmEnclosure Specifications:Sealed Enclosure: Not RecommendedPorted Enclosure: 4.25 cu ftRecommended Tuning: 32HzRecommended Port Area: 68 sq in4th Order Sealed Side: 2.0 cu ft4th Order Ported Side: 6.0 cu ft4th Order Port Area: 120 sq in4th Order Port Length: 8″Displacement: 0.23 cu ftDepth: 12.06″Outside Diameter: 15.51″Cut-Out Diameter: 13.93″ 15″ Car Audio Subwoofer 2000 Watts RMS 4000 Watts Peak Dual 2-Ohm Voice Coil