Speakers for Room Size

I had floor-standers in my 15 x 12 room - 8ft ceiling
- speakers were at one end on the 12ft wall.
- sofa on the 15 ft wall to the right
- open double doorway opposite sofa
- bow window behind the listening position
- book case to the right of the listener in the corner
- Hardwood floor with area rug

Two things thing that made a huge difference
- sound deadening material on top of the bookcase
- 8ft vinyl roller blind in front of the window

Both of these eliminated some very bad reflections

There was a very low frequency standing wave issue that only occurred on two tracks - everything else was fine

I had monitor speakers on stands and then went with the Gershman Acoustics Sonogram floor standing speakers, which did not overpower the room - they are really good at lower listening levels

The speakers are superb in most sized rooms as it turn out - my new room is much bigger 16 x 40 with 7.5 ft ceiling

Unfortunately, sound is a fickle beast - no two speakers sound the same or suffer the same issues.

I would suggest trying a speaker with a front bass port or a port that directs the bass downwards - those should minimizes bass related issues.

My monitor speakers had a rear port, which I eventually directed downwards - a very effective.solution

The Sonograms have a large 2" x 8" port at the very bottom, so their bass performance in the smaller room, while good, still presented a small standing wave issue.

In the new room they sound superb, but the speakers are 8 ft from the wall behind them

BTW - you can get standing wave issues with most speakers - it’s more to do with room acoustics and speaker position than the speakers themselves, but the position/direction of the ports can help alleviate much of the standing wave problem

Hope that helps

I had the F208's in a room roughly that size and they sounded great....the 206's should do just fine.

@prof agreed that big speakers can work in smaller rooms - there may be limitations to their ultimate performance but even then they can sound better than smaller speakers.  The issue as you point out is that you can't really say for sure until you put those speakers in that room.  To the extent that a set of speakers has the ability to tweak output (whether through jumpers, resistors, etc.) that certainly minimizes the risk of not having a speaker work well in a room that is smaller than typical for that speaker. 

Should work, I see no issues, go for it!
IMO: should produce a fuller richer sound.
I have placed large speakers in rooms the size you describe with great results. 

When my audio system was in my living room (13x24), I had a pair of standmounts with sub woofer.  The larger floor standing models I was considering had a law WAF (wife acceptance factor), in that smallish living room.
When I moved down to a 24x26 "man cave", I did upgrade to a pair of floor standing units (with a pair of sub woofers).
One thing to think about (if you go with stand mounted speakers and a sub woofer or two), integrating sub woofers can be really problematic in some rooms.  Certainly that would not be as much of a factor with full range floor standing speakers.