The FOX JK-JL-212-V-4D is one of the most popular high-output Jeep Wrangler subwoofer enclosures because it combines dual 12-inch capability, strong vented output, and a space-saving floating down-fire design that still allows cargo usability and roof-panel storage. It’s designed specifically for 4-door Jeep Wrangler Unlimited models. The biggest buying considerations for this enclosure are: Maximum mounting depth Available cargo space Output goals Roof-off bass performance Subwoofer compatibility Key Features Dual 12-inch vented enclosure Floating down-fire configuration Designed for roof-on or roof-off performance Spray-coated black bedliner finish Steel mounting brackets included Mounts using Jeep roof mounting bolts Leaves approximately 9" of usable space underneath Allows storage of Jeep roof panels in rear cargo area Common chamber vented design Vehicle Compatibility Jeep Wrangler JKU 4-door Jeep Wrangler JLU 4-door Works with and without factory subwoofer Compatible with newer 2024 JLU interiors 4-door models only Enclosure Specifications Air Space: 4.4 ft³ common chamber Port Tuning: 35Hz Maximum Mounting Depth: 8" Maximum Magnet Diameter: 7.75" Mounting Hole Diameter: 11.15"