I purchased this incredible portable amplifier new back in May of 2015. It has served me well since then, for most of that time fed by a little Audioquest Dragonfly v1.2 and powering various full-size AKG headphones (K701, K340, K7xx). I recently switched to a pair of Audeze iSine 10s and picked up a Chord Mojo, however, and haven't felt the need for additional amplification. This little guy is now looking for a new owner. It has very minor signs of wear, and works perfectly.