Hello everyone! I'm glad I found AVS! I'm currently building 3 fusion 12 tempest. Now I'm looking to add a sub or subs. This will be for a dedicated theater room. My room is 9ft wide 9 ft tall and 18.5ft long. I have an emotive umc200 with RCA out and XLR out for the sub. I have a crown XTI 4002 amp. I really like the feed back from the stomehenge builds. Any suggestions on which sub or subs to use and how many? Please ask questions if more info is needed.