Hello! I recently joined the party with some ATH-M50x, but I won't have much time to enjoy them with my laptop because I am going on a road trip across the US. I will still have my phone though, so I picked up a FiiO K1 DAC/Amp for my phone. Unfurtunately when I plug it into my phone (Moto X Pure Edition), the LED turns on and everything seems fine, then I plug my headphones in (M50x) and my phone just restarts and won't boot up until I unplug the device. I am using the stock cable connected to a USB OTG cable. I am running Android 6.0 and my USB configuration is MTP (media transfer protocol). For some reason if I select anything except MTP, it sets itself to "charging only." Is this a problem eith my phone or the DAC? Has anyone had this problem? Thanks!