Avforums has released a review of the twenty 5.21 with no measurements . Perhaps the new version is better.
https://www.avforums.com/reviews/pmc-twenty5-21i-loudspeaker-review.17565
i love this extract :
This new found airiness complements the low end heft that the PMC brings over from its...
The price in europe for this speakers is 6 500 euros, you must be more demanding for this price. In comparaison, B&W in the 700 series use more qualitative drivers and mundorf caps.
PMC is not in the same league that ATC. If you compare the measurements of the ATC SCM7v3 with the twenty 5. 21 (entry level of both brands), you see the first one benefits from a serious engineering :
https://www.stereophile.com/images/214ASCM7fig4.jpg...
The new soft dome tweeter in house SH25-76 25mm is first class :
It uses a special dual suspension system that suppresses rocking modes, as well as a short edge-wound voice coil in a long narrow magnetic gap to eliminate the need for ferrofluids for cooling. With a 15,000 gauss (1.5 tesla)...
I don't understand your attitude. I had several denon receivers and stereo amps as you but if the product is bad I would be angry at the brand and not the tester who does his job honestly