ISO: Bluetooth in ear headphone recommendation...or a decent USB Type C adapter!

[greenkomodo]

I am forced now by the industry to go bluetooth (audiophile in me shudders)...I have bought 3 USB Type C adapters but they keep failing me even after a few weeks!

 

I bought the Sennheiser Momentum Free. They are nice and all but my ears are sensitive to highs but there is a bit too much sibilance with these also the highs are bit too crispy and shiny. Can anyone else recommend a pair of headphones which has good thick bass and the highs are bit supressed? I would try to equalise these down but can't find an Android app which will do this for basically all types of media playback on the phone like jetaudio+, youtube etc.

 

My budget is fairly flexible but looking around £100 or $150. I usually buy second hand off eBay which lets me jump into the next price bracket.

 

Thanks for any help.