This is a good desk/portable AMP/DAC and pairs pretty well with my Fidelio X2/27 for PC gaming and brought a new life for my SE425 IEM.
Important to notice that if you think about using it with and android device, you may have the problem I have with the smartphone being charged with the E5 batery
This is my main problem and it`s impossible to deactivate it.
Maybe this is a positive point for some but this thing really bothers me.
It`s powerfull too and can play my DT990 PRO 300ohm problably until it`s max.
For playing music in home it`s obvious you`ll find something better but for a portable DAC/AMP and mainly for games I think it`s a good step up for a lot of people that plugs their headphones into an onboard device.
Plus: it has a very good and sensitive built in stereo mic that made my life easier as I like to play with the X2 instead of a headset.