Myself i have a different take on some of this. I don't worry too much about what individual speaker settings MCACC arrived at. I lean more toward trying/trusting the end results of the MCACC calibration. I haven't seen any documentation in any of the Pioneer forums on AVS from Pioneer as to what exactly MCACC does. I don't think we will ever fully know as i am sure this is proprietary info. I would have to believe that the Engineers spent countless hours. Testing various speakers and configurations upon fine tuning MCACC. When you listen to the test tones and review the data. MCACC is testing each speaker at various frequencies. To determine what each speaker is capable of producing. Including the sub. Each room configuration is unique. Shape of room, ceiling height, overall size of room, types of flooring, soft hard surfaces, size of furniture/placement, etc. Each one of these has a profound effect on the calibration. Who knows what other hidden settings it is adjusting. For me, i didn't make any adjustments to its settings I could see. It set all my speakers to large and the crossover at 80 Hz. The only thing I did was listened to end results in each of the DSP modes over several days. For me I found thabt while listening to music in Dolby Pro Logic II Music mode sounded most goodest to my ears. Sound quality is personal. Millage may vary. But what makes this AVR, is that you can adjust many settings to your personal tastes. Using parts of the MCACC results.
Im just suggesting to try/trust MCACC Initial settings. In reading most of the pioneer threads of the various AVR models on AVS. How many, are so quick, after running the MCACC calibration. To adjust speakers from large to small and set cross over to 80 Hz. I know that is what we all use to do. Just saying give MCACC a chance over a couple of days and see what ya think. Im listening right now to Albert King, ill play the blues for you. It sounds very clear, crisp, the bass is pronounced and tight, the overall sonic sound stage is excellent. Definitely a noticeable improvement from my old AVR and me adjusting the speaker levels with a spl meter.
Twin Pioneer AVR Locomotives-Elite SC 97, SC 1222 7.1.4, DOLBY Atmos and DTS X, (Front Pre Out,) JBL Pro Synthesis LS Series Speakers, F L R-LS80, Cen-LS, S L R-LS60, SB L R-LS60, 4 Dolby Atmos Enabled Pioneer SP-T22A, JBL 12" Wireless Sub
Mitz 73740 DLP, Sony BDP-BX650, ATV G3, Yamaha ATS 1060 Sound Bar, True Depth Firestorm 2.0 3D Glasses, Harmony Smart Control with Touch Remote, EYE Pad Air, Winegard FL6550A