An excellent speaker designer, Philip Clements at Solusspeakers.com (yes, two letters "s") 1-602-437-4445
can go over using the Solus Architectural Series in-wall speakers.
"Diamond Reference Series", especially DR-ir8 Ribbon in-wall with 8" woofer is evolved from the older floor-stander Clements RT-7 which has occupied its place of honor in my main system almost a quarter century.
The website is not evolved, just the great products.