Two curves? No. Great thread idea!

How dynamic does the Middle T sound vs an M60? How exciting? Can an FR curve tell you that?

I agree that the new adoption of klippel by more “open source” enthusiasts is awesome. But I think the more data the better.

Comparing the polar response plots of speakers allows some prediction of their sound intensity. Probably the most ignored and important metric when it comes to the subjective impression of bass in a room.

The JBL 4367 breaks the rules of the other speakers you mention, yet it is the speaker Erin would own if he could. He is campaigning pretty hard for one. I hope Harman gives him a pair!

The polar plots are incredibly important. Those and directivity index.