rational thinkers , scientists and logicians know that design of experiments is difficult at best with large groups of subjects…. science is messy and unsettled… Barton who i admire certainty voiced some frustration ( with the D in DOE )….
For example, i would never setup a group test with a large panel radiator… even the 100% measure crowd should be able to figure out WHY… and anyone who has owned panels will know why as well. Of course a point source is better but still flawed because a wide “ sweet spot” is lossy… Go ahead, use math…
ignore the blowhard know it all…. focus instead on those actually seeking to improve the complex ear / brain DOE