I have 3… pretty much “permanently” connected to the same HP. So, each of these three headphones is now made into a BT/USB-ready HP, with its own custom EQ.
One little hassle in the iOS app (haven’t checked Android): the app remembers the last 5K you connected. If you want to change settings on a different 5K, you have to “remove” it in the app and connect the other 5K as if it were new. This in the app only: no need to “forget” the 5K in the BT settings of iOS (I renamed each 5K, and select which one I want to connect to—if it’s not automatic).
EDIT: same behavior in the Chrome extension, but for whatever reason, it bothers me less…
