I would just buy them and give them ago. Really many many brands of speakers should be placed more than 3 feet off the back wall.....
I demoed the 3.6s and 20.1s a few weeks ago in a 14X20X10 foot room with Mcintosh. I thought the sweet spot on the 3.6s and 20.1 was average. It was MUCH wider than Martin Logan's Summit/Spire. But no worse than some box speakers out there such as B&Ws that always put my head in a vise. Off-axis was much better than I expected but not great. I walked around the room to test I heard no hot spots, bass nodes, and the vocals remained clear. The image was not near as sharp as the sweet spot but it was not totally gone either. All of these things will be set up critical of corse.
Some long time uses might be able to give you an idea of how many feet (or inches) wide the sweet spot will be in a room your size.
Best of luck,
James.
I demoed the 3.6s and 20.1s a few weeks ago in a 14X20X10 foot room with Mcintosh. I thought the sweet spot on the 3.6s and 20.1 was average. It was MUCH wider than Martin Logan's Summit/Spire. But no worse than some box speakers out there such as B&Ws that always put my head in a vise. Off-axis was much better than I expected but not great. I walked around the room to test I heard no hot spots, bass nodes, and the vocals remained clear. The image was not near as sharp as the sweet spot but it was not totally gone either. All of these things will be set up critical of corse.
Some long time uses might be able to give you an idea of how many feet (or inches) wide the sweet spot will be in a room your size.
Best of luck,
James.