I picked up one of these to use, while I wait for my DAP repair or the DX220 or Q5s to be released.
A few positives;
*The sound is absolutely fantastic, very smooth and the low end is pronounced while remaining tight! A very enjoyable portable output. I have tried the dac/amp from a Win10 PC. The drivers are plug and play, and otg from a dap and smartphone. Both work fine with no issues. I have found that Neutron and Onkyo HF Pkayer play bitperfect. USB Audio Player Pro does NOT play bitperfect. Everything upsamples to 192 using USB Audio Player.
*Tons of useable power, for large cans.
*Both channels have equal sound balance, at low volumes, so I don't hear any crosstalk issues. I listen at low volumes so this is major plus in my book.
A few negatives;
* The noise floor is absolutely unusable for sensitive iems. Campfire or Shure users, look elsewhere or by the ifi iematch. Just connecting iems and turning the amp on (no source), slightly past to -60db, and the hiss is loud with my iems. Regular cans are fine, ie..no hiss with music. If you really concentrate you can hear a not so black background in silent parts of some songs, even with regular size cans.
*The volume knob is smooth, but you must be careful, as it jumps in volume FAST. You can't store this in your pocket or your bag and move with it. I love knobs, but this device seems like a button would have worked better, or maybe a knob that has some resistance to stop it from moving so quickly.
The slightest touch and BOOM in sound output. This jump in volume also happens if you are using otg, and forget to mute the dac/amp before playing from a phone or dap. First time thatvhapoen, was a whoa moment
*micro USB sucks, especially for a device that costs $280 + tax + shipping.
*No bluetooth (not mandatory, but it would have been nice) and no balanced 2.5 (or 4.4mm). The device has tons of power, but maybe a balanced output would improve the high noise floor.
Lastly, this is nitpicking, but at this price I would have liked to a USB C to micro B otg cable, one short and one long, included in the box.