A 9 x 9 room is only a little bigger than a nice walk in closet. You can even get by with a nice pair of
bookshelf speakers and a decent 10 inch subwoofer. Make sure the speakers have some decent space
to breathe (air space), to radiate and throw a decent sound-stage.
Who AM I
Speakers > MB Quart VS05, Boston VS260, Snell K7, EOS 150SP
Subwoofer > Mordaunt Short Aviano 7
Receiver > Tascam PAR-200, Pioneer VSX-30