Here are the results of my 14 position measurement of my Mackie 824s.
I followed the "Project Studio" example in the manual. If the results (white line) are correct I'm a happy camper.
When my ears are fresh I'll compare ARC to ARC2 but here is what ARC came up with when I measured 20 positions (way back when).
Since then I've made some small changes in the room I can only imagine that is why the before lines are not exact, that and ARC2s 48KHz vs. ARCs 44.1KHz measurement. FWFW, ARC 1 was measured with my Tascam FW-1884 interface vs. ARC2 was measured with my RME Fireface UFX. Maybe that makes a slight difference?
At first listen to a "known" project ARC 2 sounds better/cleaner on the bass.
I plan to do a more detailed test with my projects and some known "pro" material.