It's a KICKER first, and only KICKER can provide the factory-tuned bulk to house SoloX! Pre-wired, terminals… just put the sub in the hole and connect! OPTIMIZED These are rock-solid and optimized for SoloX max performance. Ready for pounding once the subwoofer is installed. TUNED FOR MAX SPL OUTPUT The 12-inch enclosures are tuned at 31Hz for max SPL output at the most desired frequency. All you need is the L7X12 sub! MASSIVE FLARED PORT They include a double-layered baffle with extensive internal bracing and a huge, front-facing flared port for controlled air velocity. DID SOMEONE SAY BIRCH? They're constructed from heavy-duty birch plywood with 45-degree corner bracing, large brass lugs in the terminal cup, and extra-large mounting feet. Built Just for the L7X12 Front-Firing Empty Enclosure for Single 12-Inch SoloX Subwoofer Optimized for SoloX Max Performance Massive Flared Port Tuned to 31hz 10-Layer Birch Plywood Construction with Double Baffle Extensive Internal Bracing for Extra Rigidity 45-Degree Corner Bracing Removes Unwanted Vibration and Noise Pre-Wired Using Premium KICKER 8AWG Cabling with Terminated Ends Terminal Cup Includes Four Large Brass Lugs for Each Voice Coil Extra-Large Mounting Feet for Complete Stability Dimensions: Height: 35-13/16 inches (91.0 cm) Length: 19-1/8 inches (48.5 cm) Width: 16-3/4 inches (42.5 cm)