Should Speaker Manufactures provide a Frequency Response Graph?

Nope.  I buy speakers based on my hearing, not a graph made in a testing lab.  

You are gonna stare at a Frequency Response graph and not know a whole lot. Manufacturers should provide a minimum of the following:

Frequency Response

Impedance

Sound Power

Impedance

Directivity

Dispersion Polar

Waterfall Plot

7 plots...should be able to take it from there...

Posting a graph wouldn't be bad idea.  I'm sure some would resist, especially those with poor graphs.  I think if we had them all, Tekton would fall toward the top.  Eric has always been proud of his flat frequency resonse.  

They already post numbers like "40-23000 Hz +/-2 dB" so show us the graph.

I agree, buy speakers based on how they sound but as a physicist, I would likely use graphs to choose which ones to check out.  I certainly would have a problem with one that had a big dip in middle C, for example.

I think those who are having fun criticizing Tekton would not really want to see a graph of their own speakers.

Jerry

The amplitude response of a speaker is a moving target. It will change depending on the room. There are also other factors that play a significant role in audio fidelity like phase behavior and group delays. I do not pay attention to specs. I review the design of the speaker and make the best determination I can that I will be able to make the speaker perform to my expectations.