I'm about to start the planning of my new home theater addition. I want to achieve good acoustical performance throughout the space. Problem is I don't have experience in drywall, isulation, sound proofing, etc. As of right now, my idea is to have a room within a room (As I have heard it called). The room will also be on slab foundation and connected to the house on the entrance wall. Anybody know how such construction is achieved? Is it worth the money? Or am I barking up the wrong tree entirely and need to do something else acousitcs-wise? Since I am still looking at a wall of studs, I am not limited to going one direction or another. The room dimensions I am looking to have are 9.5'Hx18'Wx22.5'long.