Although it’s not quite in the same price league as some of the audio kit we check out, Head Direct’s Hifiman EF5 is undoubtedly a serious piece of kit. You’ll want to have some equally serious headphones to go with it, but then again just about every high-end headphone needs the power of a good amplifier behind it to shine. See how this amp fares with our range of test headphones in our Hifiman EF5 review.