SORRY SUBZONE HAS DISCONTINUED THESE ENCLOSURES Please see our current SubZone Selection here Sealed JL Audio W7 Enclosures Designed and optimized exclusively to stand up to the JL Audio W7's.  These enclosures are constructed with tough 1" MDF throughout for a solid well built box.  Joints are grooved, glued, and stapled to make an air-tight sealed enclosure.  The front baffle is sprayed in SubZone's Jet-Black Textured finish with the inside of the enclosure done in a midnight black look.  A 1/2" acrylic window installed on the top of the enclosure lets you view the structure of the JL woofer.  A high quality multi-way terminal cup with gold plated binding posts is built-in.  Special threaded inserts and machine screws for mounting the W7 are included - for a strong seal.   Massive 1" MDF Construction for a solid high quality built 1/2" Thick Clear Acrylic Window to view the JL Woofer