When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Did you do a search on it? I myself have started 9,387,323 threads on it. www.subthump.com is about to start making c4 prefab enclosure boxes for the c4. Basically, you remove the dual storage compartment covers (10 bolts) and slip in the box. Holds a variety of sub sizes. This is the only company specifically making sub boxes for the c4. You can get someone locally in an audio shop to fab one, but its gonna cost you anywhere from $200 to $1000 for it installed. Of course, it all depends on complexity and materials.
also, maybe you should look thru the first sticky note FAQ before you post. Usually there are answers in there for you. Usually im pretty hard on people NOT reading it. But today, im in a good mood.