Yes, I did partake in the event held at John’s house. Why the difference overall I am not sure. We discussed this at length after the event was completed. I was a bit surprised at the ease which you were able to discern between the two.
Some items which were discussed was mono vs stereo as well as room interaction. The M2 appeared as more of a point source where the S2 came off with a slightly larger image size and a bit more diffused.
While doing my own stereo testing the main differences were pin point imaging and detail retrieval without becoming strident on the M2. Again, what truly drives these differences is back to being an unknown to me. My main takeaway is that speakers measuring well in Harman’s tests will generally be perceived as natural and preferred versus those which do not measure well to the criteria. Their measurement criteria has been shown to have a strong correlation to positive attributes in regards to sound quality.
"detail retrieval without becoming strident on the M2"
Yep, my system consists of JBL 708 and 705's for the surrounds and this is also what separates the M2's from the 7 series, as good as they are.
The M2 is a very special speaker IMO.
I go by gooddoc on other forums, I think we may have chatted in the past
. I've found your journey very interesting indeed! When I got my M2's it was close to their release so there was literally nothing but measurements to go by. Consumers weren't really buying them at the time and there were ZERO owner reviews. I do wish I had the opportunity to visit JBL!, but I did get great customer service from JBL Pro at the time, that's for sure.