FWIW, Tim, I have the very first revision and it's running flawlessly. I'm not sure what "issues" you think this DAC has, but I can assure you there are none worth worrying about, especially since all current units are the newest revision, and have been for quite some time. The only real issue was a static discharge issue that only occurred in very specific circumstances, and was remedied in a revision change long ago.
That's excellent news and thanks for your quick reply
It was this list a few pages back and users still reporting problems that worried me:
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1. Voltage and current sensitive. Too high a voltage or, apparently, too low current will damage the unit which I suspect
@Lero has experienced.
A well regulated power supply like the iFi iPower seems to be critical for the device to operate safely.
@Ben1987 mentioned working on a power supply but has not said when it might be available or if it will be included with the LA-QXD1 going forward.
2. XMOS chip is sensitive to EMI as detailed by
@foguy_lucky and
@sundbp, though it seems to be a 230v mains issue as I did not read of any U.S. 110v users having this issue. Is this a potential shielding issue?
3. Static discharge damages unit. This shouldn't be an issue no matter the humidity level. Again,
@Ben1987 has stated the issue was solved. The question is, are the units currently available on Amazon, HiFiGo, etc, "optimized" or are they still susceptible to the problem? If so, when will the new units ship and how can the user identify a corrected unit?
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Can I also ask, is the firmware update restricted to those with a Windows PC (I am a Mac user and this seems to be a thing with Chinese suppliers, I have the same issue with my Denafrips gear). Because I would want to use the DAC as a fixed output all the time, but I will be unplugging and plugging it between uses as I move my headfi rig between the bedroom and the living room each day. Would be good if it didn't reset volume every time.
Cheers
Tim