Holenneck, I never said I knew about Jorn. I see he adds "step response" to my list and then goes to frequency response. I know that he remains very concerned with the non-resonant cabinets. As I said apart from these easy to measure characteristics, speakers are designed by listening to them. I guess you could measure cabinet resonance this rather than feel it.
Jorn is not talking about some measure of neutrality, harmonic distortion, or quality "measures" of speakers.
Jorn is not talking about some measure of neutrality, harmonic distortion, or quality "measures" of speakers.