Wanna help with my room?

AWESOME!!!!!

Make the deminsions large enough so you can put the speakers in the middle of the room if needed. I am told by folks in the know (Joachim Gerhard at Audio Physic for example, I think the interview is at Speakerbuilding.com) that this is the best way to get clean sound but it is never done because of "aesthetic reasons."

"Totally treated with acoustical damping" would be well...very damp.

Two good sites to view on this topic are www.silcom.com/~aludwig and http://physchem.kfunigraz.ac.at/listeningroom

Both of these sites have all of the "magic dimensions" ect...

As you know, the room is crucial and resonates like a pipe organ. Without knowing more about your personal preferences it's a bit tough to get very specific.

Good luck.

Sincerely, I remain

I would HIGHLY avoid room dimensions of 9 x 12 x 18. You would have MASSIVE standing wave problems at multiple frequencies. For best results, none of the dimensions should be easily divided by a common multiple. As such, 18 is directly divisible by 9 and all three figures are divisible by 3. This would produce severe nodes with multiple points of reinforcement. Off the top of my head, something along the lines of 9 x 14 x 17 would be FAR superior. Many of Stehno's other suggestions are very good though.

I would HIGHLY suggest picking up a book or two by F. Alton Everest ASAP and doing some reading. He has several different books out about acoustics, designing and building your own studio / listening rooms, etc... It will be the best money that you ever spent. Sean
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you guys are the best! many thanks!

Sean is right. The room dimensions really need to avoid being devisable by a common denominator. The Everest books are fantastic and can give you "golden ratios" of rooms that work well. In addition to this there are many other considerations. Outlets, wiring, isolation, absorption material vs diffusion material and when to use which--it varies greatly depending on the room size. There is so much you can do with a room being designed from scratch, it really becomes a matter of budget and taste. For example--John is right about minimizing windows for acoustical purposes--but for me, I like natural sunlight and would not sacrifice having windows, but I would make them acoustically sound (no pun intended). You have to decide what your goals and budget is and then do a complete design incorporating those goals.