Pleasantly surprised by this headphone amp considering it's cost. I use it with my mobile phone on the train commute. Makes a real difference and, in my opinion, the bass boost makes a nice difference. Not tried it on my Fiio player as that is far mo...Read morere powerful than my phone. I haven't heard the noise others refer to between tracks but it's early days. Very impressed so far.

Boosts the sound of my RHA T20s real nice, only down side is you can hear a buzzing in between tracks

Excellent product and 100% happy with it. This portable amplifier boasts my dr Dre solo 2 a lot ! The bass is unbelievable and at full volume the whole headphone vibrates and the best thing is you can actually feel the bass shaken on your ears and he...Read moreadband, 100% recommend this product if you need a extra push in your headphones

Great little amp . Very portable , it's size belies it's capability .
Well worth the money