Teclast/S:Flo2 vs. QLS QA-350, anyone?

Anyone compare the Teclast/S:Flo2 to the QA350--SD Card WAV player?
http://www.qlshifi.com/en/wzcapi/qa350.htm
It doesn't do flac, has only one WM8740, and is quite dissimilar to the Flo2/Teclast models in other interesting, perhaps important/significant ways. E.g., the QLS-350's output opamps don't seem to be as nice as those of the Flo2. IAC, both may be grouped together in roughly the same price "category". The solid-state transport-only QA550 from QLS, FWIW, seems to have developed a decent reputation in certain audiophiles circles.
(If anyone has compared the QLS model(s) to Head-Direct/HiFi-Man stuff, that feedback would also be appreciated).

Gracias!

Quote:

Originally Posted by a_tumiwa 

i own 3 of them, i prefer the sound of QLS (mine is 350 not 550) than T51/sflo2, QLS has a thicker low frequency than T51, but the problem is QLS is too big, the size is bigger than hifiman 801, for 801 vs qls, i still prefer 801, but it is too expensive ($190 vs $790) , if you care about your money, then you must think a few times before buy it

Thanks for replying. Yeah, the HiFiman's are mucho $$.

The 350 is more attractive than the ugly 550 for sure; and, based on what I've heard/read, more robust/solid than the 550, too. I prefer its (and HIFiMan's) heavy-duty design over the delicate S:Flo2/Teclast devices.

Does the 350 have I2S out? I know the 550 does [tho' via PCB only] this is my main attraction to the QLS units. ( I've got a quite a few DIY DACs [D/A processors lying around, just begging to be tested!) If yes for I2S and there is enough room inside the 350, I might be able to squeeze in a small stuffed PCB (chock full o' goodies like PCM1792 DAC [or eqiv. AD or CS DACs; will try to avoid WM as they are so common and possibly perform compromised I/V due to "in-house" processing] preceded by an SRC/upsampler and followed by a killer SMD I/V + output buffer/filter stages). Theoretically, this should better even the HiFiMan.