Sundown Audio X-10 V.2 D2 10" 1500W RMS Dual 2-Ohm X Rev 2 Series Subwoofer X-10 V.2 D2 - Sundown Audio 10" 1500W RMS Dual 2-Ohm X Rev 2 Series Subwoofer Xmax = 30mm one-way by 70% BL | RMS Power = 1500-watts | * Vented magnetic gap | * Optimized high-velocity pole vent | * Innovative high-velocity vented frame spacer ring Black Aluminum 3 voice coil former for superior heat dissipation | High Temperature Round-Wire CCAW voice coil with high-temp black adhesive | ** The 18 model with optional tooled Sundown Frame uses a 4-Layer Flat Wire / All Aluminum Coil that is ~30% longer | Large aluminum faraday ring (Magnet ID) Spring Loaded Terminals | Stitched-On Double-XL Tinsel Leads to prevent fatigue and failure | Mega-Roll v.2 Surround Technology | High strength, custom tooled & patented cast aluminum frame | Optimized for small ported & band-pass enclosures * -- These features combine to create the optimized coil ventilation system | Ported: 1.50 ft^3 | Displacement: 0.21 ft^3 | Depth: 8.88" | Outside Diameter: 11.65" | Cut-Out: 10.01" | Recommended Tuning: 32hz | Recommended Port Area: 24 in^2