Cant agree with this enough, the HTC10's DAC is freaking amazing. I sometimes actually prefer it over my DM3's DAC. Obviously the latter' ESS DAC implementation is piss poor and sounds decent at best, specially when using 3 or 5 driver IEM's. I use my Dunu Titan 1's at work for casual listening with the HTC10, and boy does it sound amazing. Not swtiching phones anytime soon, specially not to the bootloader locked down world of Samsung.