I paired mine up w/an external speaker & have no issues:
Philips - docking speaker with Bluetooth® for Android - AS140/37 - Docking Speakers - Home audio - Sound and vision
I've read up on BLUETOOTH issues,as I'm experiencing some of my own w/regard to call quality & came across something that might
Turn off WI-FI & BLUETOOTH,then turn on BLUETOOTH 1st & then WI-FI.
Some have reported that this works w/some BLUETOOTH issues,but,it does nothing to resolve mine.It's worth a try.
The only other suggestion I have is turn off BEATS & see if that helps.