If you are familiar with Z-reviews on youtube, he has one and seems to like it. He briefly talks about it in his recent Fostex t50rp mk3 review. He basically just says it powers the hard to drive fostex t50rp mk3. I'm hoping he will release a review of it soon, so maybe give him a sub and hopefully he will release a review soon. Unfortunately that is practically all I've heard about it on the whole internet.
I just got mine today.
Sounds good, nothing to complain about. Metal case is well build. Knob is plastic.
Works right out of the box.
I had distortions in my soundcard, that is solved with m3.
It has plenty power for me. I tried with my HD650(300 ohm) and i can get them (for me) loud enough with the knob at 9 o clock(not 25%, the knob doesnt turn 2pi, about 320 degrees maybe).
Works also with my m40x(32 ohm).
Mine came with a pc_usb->mini_usb wire and a mini_usb->mini_usb wire and 1/8 to 1/4 adapter.
Overall very nice would recommend it.
I bought mine three weeks ago and it's a good entry level dac/amp. I have easy to drive headphones so I can't talk about raw power.
With my SRH440 (and HM5 pads) the soundstage is noticeable large and the bass is more punchy. The cans work just fine without an amp but there is a improvement if you are used to the sound as much as I do.
I have also a pair of VE Monk+ and I will test these in the next weeks too and edit this post. I listened a couple of hours and I'm not able to say anything.
There is definitively an audible noise but I guess that is because my cans are way to easy to drive to this amp (at 9 o'clock is loud, I have to turn the knob to 8 o'clock or even less). A channel imbalance at very low volume is also present in my setup but like I said, with more power hungry cans this should not be an issue.
Update: The VE Monks+ are overall a bit better with the amp. The sound is fuller (the low end is definitely not the best but the sound has more body with this amp) and the mids have more detail, but not that much, it can be the placebo effect.
I have also tried my SRH440 with the stock pads and the mids and the low end are more clear, less congested.
2nd update: I recently bought a pair of Fidelio X2 and there is no floor noise at all. The channel imbalance have also disappear because they need a bit more power than the Shure. Being open I think it helps too.
Great setup and a fun sound for less than 400€.
For music its enough but for some blurays or dvds never on ps4. The m3 put out 1,9 mv the 650 needs at least 2 mv. The tarion trd 80 is better from smsl too more power. Yeah power is volume. The m6 is very decent too or the Fiio taishan d03k with that u can use every amp with line out on ps4