obviously a "hifi" dac/amp combo should deliver enough power at 300 ohms. I would suggest buying one that delivers enough power. or are you concerned with batte

obviously a "hifi" dac/amp combo should deliver enough power at 300 ohms. I would suggest buying one that delivers enough power. or are you concerned with battery usage? just a sidenote: the sundara you mention have 37 ohm which is pretty standard and they should be easy to drive.