I am getting my wife a set of Sennhiser headphones for xmas and was looking at a portable DAC to drive them with off her phone which is a Galaxy S7. Looking at threads here, I do not see much about DAC's. Is the Dragonfly Red or Black a good choice for portable DAC that would drive Sennhiser Momentum 2 headphones, or are there other choices which are not real bulky or hard to pocket?
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