My method is that I listen to my speakers on different songs after hearing on many audio setup and headphones. I know what they should sound like.
I adjust the sound after listening to the PRUR DIRECT mode which has not sound processing in it period. Then in normally lower the ferquencies in the trebal ranges because the RTi A speakers are bright naturally and have been review as such with exception of the RTi A3's reviewed in Sound and Vision.
Then I listen again and turn the system up high (-8dB to 0dB) to see if the trebal becomes harsh or not. After that, I go back and into the EQ and make the proper adjustment. Then listen to the new curve again with DIRECT mode (which keep the EQ and not much else) against the PURE DIRECT (which strips all manner of sound processing).
I repeat the same on the bass and mid range for the RTi A9's. I find that the RTi A9's can use a increase in the bass frequencies and decrease in the treble frequencies. The mid range freqs are normally fine with a flat curve and there is a review which showed measurements and listening demo which said the same in Home Theater Mag.
This is how I tune the 2 channel audio in full range curve and save it in one of the presets. After a couple days of listening and coming back and forth to it, I'm able to create a nice sound that is pleasing to MY ears.
I absolutely love the MCACC because I can do what I want. I would like 2 improvements.
Separate crossover setting for all speakers.
To be able to adjust the EQ while listening to material.
Not needed, but a sub EQ would make it as good as I would ever need.