My pair finally arrived, 6 weeks later…
I came across this review, thought it was interesting in terms of how he measured it and was wondering if @Resolve could weigh in to explain as I am ignorant on these matters.
https://www.soundstageglobal.com/index.php/blogging-on-audio/264-brent-butterworth/936-how-well-do-the-apple-airpods-max-headphones-measure