I did run a manual SPL check last week on my system (LP at 18FT).
I could have sworn I set everything to 80dB. But everything was set to 75dB after all. I must have left it alone when I ran Audyssey after moving to my new house.
When I get my new RBH SVT towers next week, I will run Audyssey and leave the SPL alone too.
A lot of guys (falsely) feel that if they have to turn the master volume to a certain number that their speakers are "underpowered".
And when I tell them to increase the SPL so that they don't have to turn up the master volume, they feel better.
IMO, there is absolutely no harm in increasing the Speaker Channel levels if it makes them happy and saves them money by not having to buy another amp.