Hi,
I've some weird behaviour with my pair of sonos era 300s:
Most music sounds good (especially after latest update) with my current settings (Bass +5, treble +8). Rock, metal, stereo and dolby atmos either.
If I play Rammstein RMX by twocolors, it has too much bass (even if I reduce my Bass settings). The Bass is sort of issue known as car speaker disortion.
I haven't done further tests with other bass-based tracks but with track above my ears hurt..