Building a Music Room

Now may be the ideal time, assuming you plan to stay in your house for at least five years, as the building trades are slow, so you could most likely get a great price. Consider making it a 'media' room to increase the WAF. I built a media room in a new house many years ago, but it was in the basement. Would not do that again. Go for above grade, on a slab, carpeted. Don't design the room around connor speakers. I had K-horns and found that you get tired of the sound, quickly. Do consider Rives for the design phase, no one does it better. Hey, the government will give you a nice tax credit with all the insulation and special windows you will need to put in.

Ok guys thanks for the replys so far!!!
buconero my speakers are extremly modded 2"wooden tractrix horns/2"BMS drivers and a xover designed for them. The bass bins are the only unchanged area of my speakers. I doubt that I will grow tired of what I am hearing now, thanks just the same for the tip. I only mention the conner horns as a refrence to get info on the size of the room I should be looking into.

If you build on a slab, design an area to run your cables. Put the speakers and amps on one end and front end down by you so plan on running a long interconnect. Cover the slab with 2x4s layed flat, then wood across the 2x4s with carpet on top of the wood. A wood floor sounds better than a concrete slab with carpet. For carpet, consider a wool type instead of synthetic. Rives is good, but there are others. See if there is a Negwer materials store near you. They have acoustic consultants.