FiiO E12 portable headphone amplifier Montblanc (3.5 mm Stereo Jack Black) (Electronics)
Significant increase to E11, fine, by audible, sovereign and more spacious. And laaauuuut. Light boosted bass, me too little treble, so 1 star deduction. But makes no HighEnd MP3 course is definitely an increase in the usual KH outputs to smartphones