I would like to purchase plans for a home theater subwoofer enclosure. The active driver is a TC Sounds 15" tc-3000 and will use 3 passive radiators. (2) 15" TC sounds VMP Passives and (1) 18" TC Sounds VMP Passive. I'm thinking a 25" cube with double baffles all arround. Internal bracing can be window type like I've seen in your other designs. This is my basic vision. Please don't hesitate to contact me if you need more information. There wasn't an option on your website to purchase a design for a passive radiator enclosure therefore I decided to contact you first. I look forward to hearing from you.