Good luck with your experiments - look forward to hearing about the results, what ever they may be.
Given I currently cannot distinguish between the 2 "polarity" tracks on the Cardas Test Record (yet my mains power is
connected up optimally to the power transformers in my phono stage, preamp, active XOs & power amps), the next experiment will involve changing the slopes on my active XOs to 6dB slopes ... so I can connect the mid driver in the same polarity as the other 2.
If this still doesn't let me hear a difference ... then there are only 2 possibilities:
1. there is
no difference, or
2. I belong to the class of people who are insensitive to absolute polarity.
In that case, I will choose #2 over #1.
The only way I would choose #1 is:
* if someone lent me some full-range speakers (ie. 1 driver, no XO) and I still
couldn't hear a difference, and
* 999 people took the same test, on my system, and none of them said they could hear a difference. So that would mean 0 out of 1,000 people could hear a difference ... then I would start to believe it's all a myth.