Nextbit speaker volume low

Hi I've had my Nextbit Robin for a few months now and I'm participating in the beta, and I recently got my SO a Nextbit to match me. She's updated to the newest software update which I believe is the same build as beta right now, and I just realised her speaker volume is quite noticeably louder than mine. Is there anything I can do? I don't know how this has come to be.

 

Yea, I've been having this issue ever since I joined the Robin Beta Test, back when it was for original 7.0. Sometimes it's not bad, sometimes a reboot helps, usually not though, when I first got it on Marshmallow, speakers were great! Now to this day, disappointing.

 

You could try a format data/reflashing from a factory image.