room dimention question

My experience is that the first reflection off of the ceiling has a negative impact on the imaging. The best sounding room for me was a very high ceiling with a vault that is lowest on the speaker wall and goes up as it goes to the back wall. Won't work for you but there are lots of products that address reflections.

The house that I rent has sloping ceilings and the low point in my secondary listening room is about 7' as well. I found that the low ceiling did exacerbate some midrange glare that I already was having a slight issue with. I ended up stapling foam bedding to the ceiling and this remedied the midrange glare more or less. The low ceiling did not seem to compromise soundstage height though I did find that my BG Corp 520 loudspeakers seemed more open and airy in the listening room with the higher ceiling. Unless your speakers approach the height of the room, you probably won't have any issues but, of course, only trying it out will tell. Good luck.

Thanks for your responses. I am thinking about the electrical as I will be doing this room from scratch so anything is possible. I do however need to make this look like a nice finished room. I can't make it look like a dormitory crash pad. So I'll have to finish the ceiling in some fashion.

As far as electrical goes I'd put in dedicated circuit breaker and wire just for your audio. I'd use the heavier gauge that is for 20 amp circuits and use a hospital or other specialty AC receptacle.

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.