Check the listing for details. 95-99 2G Eclipse Spyder Sub Subwoofer Box Speaker Enclosure - Concept Enclosures. Condition: New. Listed at 254.99 USD. Details: - Charcoal carpet (black carpet may be substituted upon request) - 8.5" mounting depth - 2 separate chambers - 1 cubic ft / chamber - 3/4" and 1/2" MDF - Roughly 40 lbs - 2 12" subs standard (other sizes and setups available) - Round spring loaded terminals included (1 per sub) - Sealed with liquid nails caulk. Subwoofer Availability: 1 or 2 12" subs 1 or 2 10" subs 1, 2 or 3 8" subs Installation: The sides of the enclosure are designed to fold up and down for installation purposes. fold the sides up, drop the box into the car with the subs facing torward the front of the car, then rotate it backwards and into place. When it is in place, you may unfold the left and right sides into place. No bolting is neccessary.