Check the listing for details. 2000+ Toyota Celica Custom Subwoofer Box Sub Enclosure - Concept Enclosures. Condition: New. Listed at 249.99 USD. Details: - 3/4" and 1/2" MDF Construction - Charcoal automotive carpet (black carpet may be substituted upon request) - Holds 2 round 12" subwoofers (10" subs or single subs may be substituted upon request) - .75 cubic feet per chamber (volume can be reduced upon request) - 8.5" mounting depth - Round spring loaded speaker terminals - Sealed air tight w/liquid nails caulk - Roughly 25 lbs. Subwoofer Availability: 1, or 2 12" subs 1, or 2 10" subs We can also cut square holes upon request. Installation - The right edge of this box folds over and is secured by the carpet. This is for installation purposes. You must drop the box into the trunk at the rear with the subs facing down then rotate the box backwards so that the subs are facing the rear of the car. after sliding the box agains the rear seat you may fold the right corner into place so that it is level. It will rest snug and in place on its own.