Should Speaker Manufactures provide a Frequency Response Graph?

I would not be interested...

PS - So long as you accurately publish the methodology you use to measure I don’t see a problem, even if that method is non-standard.

Now, coming to poor conclusions based on measurements, that's kind of ASR's bag.  😂

Eric at Tekton Designs has been battling two different reviewers who have posted measurements without his permission, using Klippel devices for their respective measurements.

So what? They posted measurements without Eric’s blessing/approval? Oh the horror! It’s a free country dude so comes with the territory. Other “manufacturers” (ehem) get by just fine without threatening litigation except for, uh, Bose. Go figure.

I’d really like to see an impedance graph along with phase angles. A frequency response graph doesn’t mean squat if my amp can’t adequately drive the speakers. Nominal impedance??? C’mon man.

The waterfall plot displays both the frequency response of a loudspeaker (in various dimensions) and it’s behaviour in time. It is very revealing of any "ringing" in the speaker’s response, ringing being a major cause of the lack of transparency a loudspeaker exhibits.

I agree with @bdp24 . After looking at waterfall plots for years, I feel like I can get a good idea of a speaker's amplitude response even though of course in the end, you have to listen to it.