JL Audio 8W7AE-3 8" Single 3-Ohm W7 Subwoofer Anniversary Edition (8W7-3) 8" Single 3 Ohm W7 Subwoofer Massive Forced-Air-Cooled Aluminum Alloy Frame Highly Linear, DMA-Optimized Motor System Top Mount Depth: 6.83" Cutout Diameter: 6.94"