About a year ago, I downloaded the Wavelet App to my android smartphone.
It automatically pre-sets the eq for over 2700 different models of headphones.
If yours aren’t on the list, you can use the graphic eq to create one to your liking.
I created one based on my audiogram for a pair of IEM’s that weren’t on the list, but my high freq. loss was bad enough that I need my HA’s to enjoy the full range.
This AM, I was working out, and used my Oticon ConnectClip to stream some Spotify stuff.
Not realizing that the Wavelet app was running (don’t remeber when i turned it on), but the sound was really nice, especially the upper frequencies.
I looked down at the phone and realized the app was running,and was quite impressed.
It works on android at system level, without the need to root your phone!
I have no connection to the dev who created it, but I believe it’s worth looking in to.
Oh yeah, the basic app is free, no ads, either.