Hi John,
The Betsy baffles are pretty adaptable when it comes to room size.
I have several customers who have 12' x 12' listening rooms and are quite happy with the sound.
Nearfield listening works OK, but in my opinion the best sound happens when the listening seat is 9 to 12 feet from the speakers.
Two or three feet from the front wall works well for speaker placement with about six to eight feet between the speakers.
I have a page on my website that answers a lot of commonly asked questions about the Betsy baffles. It can be found
here.
If you have any additional questions, please let me know.
Best wishes,
Randy