I do not know what the DAC is. I updated from an iPhone 5 and I thought the audio was incredible on the iPhone 6. Used my Sony in ear headphones (MDR EX1000) directly connected to the phone and was pleasantly surprised by the clarity and quality of the audio. My previous set up was with an FiiO E7 and an iPhone 5. The audio is so good on the 6 I don't see myself using the E7 very much.