I hate to be pessimistic, but you have ALOT of obstacles to overcome. While the above suggestions will probably all help, an extremely small room with wood ceilings and tile floor is a heinous combo for listening (especially at loud levels).
I think the hardest thing for you to deal with is a low wood ceiling. Almost everything sounds different in a wood ceiling room. Ceilings are just as important (if not more) than any other room aspect. One of the overlooked reasons for why equipment usually sounds better at a dealer location is the high acoustic ceiling tiles that are common in business office space.
On top of that, your small room probably does not let the speakers breathe and you can't get far enough from the speakers to let the sound properly integrate.
Instead of spending a fortune to correct that room, I advise moving your system to another room and throw a Henry Kloss Model 1 mono radio in that small room.
I think the hardest thing for you to deal with is a low wood ceiling. Almost everything sounds different in a wood ceiling room. Ceilings are just as important (if not more) than any other room aspect. One of the overlooked reasons for why equipment usually sounds better at a dealer location is the high acoustic ceiling tiles that are common in business office space.
On top of that, your small room probably does not let the speakers breathe and you can't get far enough from the speakers to let the sound properly integrate.
Instead of spending a fortune to correct that room, I advise moving your system to another room and throw a Henry Kloss Model 1 mono radio in that small room.