The past few days I kind of missed deep bass I was used to. Unfortunately I don't have anything but my ears to proove it so I might had a bad week.
Since I wanted to do some tests for some time now I started playing around with the XT32 and bumped into several questions.
Is it necessary to measure more than one position? I repeatedly compared both configurations (1 and 6 positions) and I didn't notice any difference. Even more, in some cases I thought the bass was even better when measuring a single (MLP) position.
So, if one always uses MLP - does even make sense to measure all 8 positions? I assume it's easier for Audyssey to set up a good response only on one position instead of doing a compromise for achieving the same for multiple seat locations.
Another interesting thing when measuring only 1 position: center channel rossover was set 20 Hz lower. But it was still set to 100 Hz. I managed to trick the Audyssey and slightly moved 500 Hz and 1 kHz bars on my external EQ: the center XO moved from 100 to 60 Hz. Not really sure why. If you lower a frequency Audyssey should correct that. And it did. But why lower the XO?
Then I checked the speaker levels with SPL meter and found out that surround speakers are approx 2 dB louder. I tried equalized test tone settings with THX optimizer. If I turn on DEQ - even more. Some scenes with DEQ are really loud in the back.
Which brings me to DEQ. We know that DEQ simulates the effects as they would be audible at reference level. In my explanation, it enhances height/side effects including bass. Could it be that DEQ is "preparing" the content differently each time? That would explain why I missed deep bass in some well known scenes. And why reloading a config file seemed to help.
I got to try the same scenes without DEQ and see what will happen. Until now I have been struggling whether to use the DEQ or not. But if it does not work the same every time then I see no sense using it.
It may as well be a placebo ... but I kind of doubt it. So far I was always able to trust my ears.