You either have a faulty pair or they aren't sealing properly in your ears, the wf-xm4 have unusually good bass for TWS and they have very tame treble, I prefer them to the over ear wh-xm4. In the app there is a seal test, I think its in the third section of the app, try it out. I usually have the volume at about 50%, I never raise it over 60% as it starts to get uncomfortably loud, I don't have super acute hearing.