I'm just adding a link to the Vandersteen speaker review (test measurement page here in case anyone findds this graph accidentally.
https://www.stereophile.com/content/vandersteen-quatro-wood-ct-loudspeaker-m5-hpa-monoblock-power-amplifier-loudspeaker

The comments section of that review included a request for this comparison, which JA kindly provides here.

Thanks for this measurement my 50-year-old AR 3 speakers also have a nice frequency response and measure well too but How about the step response test that shows timing of music especially at my listening chair?
Best JohnnyR