Cool, that ~ <300Hz range (give or take) seems to be the recommendation by the room correction experts out there.
I was going to buy Acourate but then I thought I’ll hold off, after seeing this from Brian a while ago:
He’s a clever Engineer and pretty good at maths, so I’m happy to wait for Roon to make it easier with an integrated elegant solution, even if it takes time to do it well, whether in house or integrate a 3rd party solution 