Originally Posted by oztech
I think you miss the point of the test ....
Thanks for the thought but no, I haven't missed the point of the tests. If I might encourage you to reread what I posted as I tried to cover everything but how I understand the concept/purpose of these types of tests. Prior to your above comment, I actually edited your point out of my comments because I considered it a defensive, ego related comment. These types of ground plane tests are not "ANECHOIC" and instead, are a compensated, quasi-anechoic substitution due to not having an "ANECHOIC" chamber at one's disposal.
The further one gets from the central idea of an anechoic chamber, the more one depends on compensation files due to the fragmented nature of multiple speaker based subwoofer systems, the further one gets from reality. As I posted, if you or anybody else is good, I'm good. I'm just saying and based on what I posted, in this case, one should keep more than just one eye open.
I remember looking at posted quasi-anechoic test data and thinking wow, now that's neat suff and I remember the slamming my head took when I graphed my first measurement sweep. "Really!" That was my "Holy crap" moment. It was then and there I realized how little these tests mean to the real world. From there I set out on literally, a one year sojourn (actually the sojourn continues) to better understand the why of it all. For the effort, I'm still an incompetent old fool but I'm my own incompetent old fool that has much more than a single eye open.
Regarding comparative performance, as to what to what one can expect, on my part, in a case of oversimplification, size of driver, amplifier, type of enclosure and Xmax, coupled with user reviews and posted REW room measurements, will give most engaged consumers what they need to know. From there enters room aesthetics, budget and WAF. None of which shows in any measurements. An example, all things equal, in our Home Theater, who's the better manufacturing choice: HSU, PSA, SVS or Rythmik? For my consumer reasons, I've narrowed the field down to Rythmik and PSA and these reason have absolutely nothing to do with third party test data.