Pros: Great sound, does most of the basics that you'd expect
Cons: No digital output - a missed opportunity! Also lack of refinement and options in the UI
The market for high-quality portable DAP units is steadily growing. Go back a few years and most people around here were running an iPod with a line-out dock to a portable amp, or something similar. Since then we've seen the release of various HiFiMAN units, the Colorfly C4, various Studio and RoCoo models from HiSound, and now the iBasso DX100. We've also seen the relatively unknown QLS QA350 come out of nowhere and offer features that few could match (but also some significant trade-offs) at a really low price. All of these units promise better-than-iPod sound quality, including the ability to play FLAC and other formats as well as drive full size headphones properly. That sounds great but there are also downsides - high prices, larger size, shorter battery life, and of course a UI that can't hope to match that of an iDevice.
Size comparison with QA350
They are the same height/width, though this pic makes the 812 look thicker
RoCoo D Power Edition is way smaller
Leckerton UHA-6S mkII
Meizu MX 4-core
Clearly the Meizu or any similar smartphone has a lower profile
Add an amp to the mix and things are actually rather close
Wolfson WM8740 DAC
Analog Devices AD1896 asynchronous sample rate converter
Analog Devices AD8397 for headphone out
2 layer design
The spring on the top right normally pushes against the case, to ensure proper ground
The culprit - I could not get these things apart!
Headphone and line out
Another reason the device wouldn't open for me!
Startup animation - the needle moves from left to right, and it takes just a few seconds
Select "music" and you get this menu. Resume play no longer works if the power switch was turned off.
All Music gets you a big list of tracks in alphabetical order
Selecting by folder
The "now playing" screen - note the unused space and lack of metadata
MP3 files never had issues with tagging
The overlay menu
EQ is not worth bothering with
There are some customization options, but not many. This freq chart animation is really choppy looking.
Another minor issue - by default, the player will be in single play mode where it stops after playing the selected track. To fix this, go to "repeat mode" and choose "all", which really means "play all the songs in this folder before stopping". Maybe it's a "lost in translation" sort of thing.