I have cambridge audio melomania 1. Bluetooth headphones.
These can go pretty loud on my previous phones.
https://myip.kim/ However on the p30 the max volume is quiet in comparison. This may be limited to the 'can harm ears' volume other phones have. But surely there must be a way to boost it? Bass seems to have vanished too.https://elecpay.in/tneb/
https://birthdaywishes.onl/ Not a big fan of phones enforcing limiting on volume..
Using latest EMUI.