how big a speaker can you put in an 11 x 11 room?

My room is a 11X12X9'ceiling(huge)and I have Revel 50as+a revel 50a centre speaker,I'll put it this way,
I have four component racks(full 3X7bssts+2X4Bssts,cdr,cdp,clearaudio championII TT,2-Torus units,Arcam prepro av-8 and Arcam-139 dvd,and 2X Velodyne DD-15s.the racks take up the one wall with just enough room for the mains,I have one sub almost halfway along one wall and the other almost behind the couch.I like what I'm getting for sound,but I'm sure with a bigger room it would be way better.when we do get a bigger house,I know I'll be ready.

how big a speaker can you put in an 11 x 11 room?

You will want to stick with small monitors + a small sub with that sized room. If you go with a big speaker, it just means you are going to have big problems in that very small space.

Depends how big the door is.

I have responded in another thread on the same issue in that I am a big fan of small speakers(either small towers or bookshelf speakers on stands) + subwoofer in a small room. A large speaker in a small room often sounds like crap most of the time. Having said that, I have seen a guy having the Marten Coltrane floorstanders in a 9'x13'x8' room which is an exceptional case. However, that room has got some real serious treatments and planning gone into it as all the wall surfaces which include the ceiling have been treated.

Dgad's advice may only come in useful if the speakers are meant to cater for a strong 100,000 crowd of a large rock concert.

Some speakers are designed to be listened to at a greater distance than other speakers . Your question does not have a one size fits all answer...pun intended !

Happy Tunes .