My Pio 45TX has MCACC and it seems to work out fine. I never bothered to pull out an SPL meter.

I just got a Denon 3310 and did the Audyssey set up. Sounded fine, but oddly, I had to up the sub from 9 o'clock to almost 1 o'clock just to get the calibration working. Not sure why the sub is so low on Denon.

And now...the Denon is in the shop getting the HDMI repaired.