room dimention question

Some advise far more easily provided than adhered to:
1) 2 -3 dedicated outlets, isolate digital from analog,
2) 1" sound panel on primary reflection point on ceiling and and 2" on walls adjacent to speakers, also on rear wall behind speakers. Also absorbers or reflectors behind listening position. Check out ATS Acoustics web site (atsacoustics.com) Piper City Illinois 866-787-7881 for panels and DIY material. I built my own and saved $$$.
3) Some form of bass traps in corners behind speakers. Also can be DIY.
3) make room rectangular, with long wall 1.3 to 1.4 times short one. Consider taking a long wall/near field approach to speaker placement and listening position.
4) if dealing with concrete floor, know this can be an issue. Can sound cold. I have this issue and am considering framing in a floor. I have 8'9" ceiling so could spare the 4" space. Right now I am using Wall to Wall carpet over thick pad and an additional area rug.
Place your equipment along side wall not at point of primary reflection as opposed to between speakers. Better sound stage and image.

Having a dedicated room makes for a great audio experience, regardless of the constraints one has to work with. Enjoy and good luck.

Fly tying to good music, great! I also store fly fishing gear in my audio room. In a corner closet, I have removed the door and store my sleeping bags and pads, makes a great bass trap. Enjoy.

Catfishbob, Since this is your thread I guess we can't be accused of hijacking. I fish fresh water, locally in southern illinois for panfish. Have fished for trout in Wyoming. When out west i go to local fly shop and ask for advise. Trout fishing via fly is a study in Entomology and Limnology. Have fun building your room.