Hey grannyring, my room has a window with a plantation shutter on the left wall, right at the first reflection point from the left speaker. My speakers are toed in a fair way. I’ve played around with the position of the shutter but haven’t noticed a difference. As an aside, I recently installed bass traps in the corners behind the speakers and the difference is phenomenal.
Please comment on your experience with Plantation shutters. Yes they look great,
but do they act as good sound diffusers over windows? Has anyone noticed they improved the sound in a room with windows? I am thinking they may do a good job when tilted, but not fully closed. Perhaps even better than 2 inch wide standard shades?