I am going to build a listening room

Suspend the room on springs and make the room spherical. Paint the walls industrial green.

I'm doing the same right now. Roxul is very cool insulation. Any air gaps are your enemy. I even installed cool running can lights so I could insulate right over them (LED). Any in ceiling speakers should be enclosed, no open backs. Quietrock is very neat drywall for walls but is not recommended by the manufacturer for ceilings because it can sag. It's expensive too. Pre-wire and do your best to keep power away from signal, electricians don't seem to care. I ran some extra lines just to future proof things. For the concrete basement floor I put in a floating floor that home depot and lowes sells. It is 14 inch squares with a black plastic backing with feet. They interlock together and can be glued together if you like. It keeps it warmer, keeps any condensation from the floor away from you and helps with small water issues. Floods are a drag but not much you can do except have insurance and keep everything off the ground.

Finally, power: You can never have enough. Whole house surge protectors will stop lighting hits but not as well as you think. We have been hit twice at the pole and even though it tripped the whole house surge, it tripped the surge protectors inside. They are more sensitive and will trip faster than a big 200 amp unit. Do both.

Mike Holmes and others have a bunch of videos on youtube about roxul, quietrock and more. They are worth spending an hour on.

I don't want to burst your bubble, but I do need to caution you. About 15 years ago, in a brand new house, I built my dream-cave which room was to be dedicated to music listening. Long story short...the basement flooded with almost 2 feet of water roughly 2 months after the room was completed. The basement has flooded several times since and has now been de-constructed. All a very sad story with the builders getting off free as a bird.

HAVE I GOT A THREAD FOR YOU!!!...:-)

"The Thread has been listed for the last i don't know how long on one man's "over the top, "step by step journey just above this post!!