Still, hard to know what spl needs are so far and what, if anything, a more powerful amp might provide. You can always allow for higher peaks than that calculator, too, but what does "70" even mean on your volume scale? Is it calibrated to a standard of some sort? Is it a linear volume dial or dB based? Might a little extra juice being available give a bit more oomph if you turn it up more? Maybe, you could already be close to the limits of your speakers to an extent (not in terms of max power before damage, but just simply sounding good, not going into significant compression, distortion, etc). Are you running each speaker full range or are subs involved or ?
On my Rotel, the volume goes from 0 to 100, zero being no volume and 100 being max volume.. I am limiting it to a max of 80. My old Technics stereo system had the volume start at -78db (no volume) to 0db (max volume).
I never understood what the reason is that manufacturers do this... 1 to 10 is pretty straight forward to me....
Forgive me though, I may just not know.
I will remove the "80" volume cap for the Rotel and see if I'm not causing my own 'loudness' issues.
I can switch the Rotel into '2 channel' for stereo listening....music..etc. But I also use the system for home theater as well, as the Rotel is integrated for home theater.
Most all of my input is from my computer via HDMI to the Rotel. Movies, music.... etc.
Part of my thought for upgrading the system was to have separate components vs integrated all in one. My thought was separate components will perform their functions better than integrated components, in general.
This also makes updating/upgrading in the future easier as I would be able to upgrade just an individual component instead of the whole integrated unit.