Latest update firmware Motion boom plus, October, 00.39

So, i feel like the latest update made the speaker a bit less loud, especially around low frequencies, is it related to the new update or just me hallucinating? Is there anyway to retrograde to the 00.38 firmware to see if it’s true ?


This would be a question for the support.
Or may be other users know.

About updates :
When updating LINUX its always possible to get older versions of a program (eg kernel).
I dont know if this is possible with other OS.
To add such a feature to the soundcore app, one can choose between the versions, could be useful.