I am using my recent binaural compensation for this video. If you listen at exactly half volume with the Free Pro 2 and my reference tuning, you should also get the correct volume level that I was hearing in real life. I will continue to optimise both my compensation as well as improve the reference tuning for an even more neutral response which should also render my recordings more faithfully.
In the meantime I managed to do a quick measurement of the Motion Boom Plus just to check what's wrong with its response, and the heavy peak at 6khz is visible quite well I think:

I won't report this to Anker, as I don't care and am not here to give them hints how to tune their speakers properly. If they don't manage on their own, that's their business.
Sturmflut
2022-07-22 12:59:20 +0000 UTC