It was not that terribly loud in the mids or highs due to the voicing curve. So it makes one ride the volume 6 dB higher to hear voices clearly thus raises bass. If it had been neutral i would be out of the room at that volume level
Yes I have a phone app. The system i have measured to 114 dB plus in the past with hearing protection.
The action rolls off mids and highs by 6 DB. The action movie takes highs off even more an additional 3 dB. McIntosh support will send one a program to create custom voicings or choose which canned voicings you wish to use and have uploaded in the MX150. In the future I would just use action 1 which is 3 dB roll off of mids and highs if using P20 I use neutral voicings for music unless the source is bad. For movies I usually just use movie voicings or neutral or music if the movie has good music soundtracks.
My speakers have great response thanks to Roger Russell so I rarely play with equalization unless a movie. There is is 12 twelve inch woofers in play for movies. Thus the huge current draw.