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For context, the NwAvGuy O2 amp[0] design is pretty famous now. The dude even lays it down right there[1] in the comments of the linked article. And then soon after that iirc he just disappears?

[0]: https://nwavguy.blogspot.com/2011/07/o2-headphone-amp.html [1]: https://nwavguy.blogspot.com/2011/02/headphone-amp-impedance...

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Yep, I remember following these articles when they came out. I bought their DAC design and it's been in continuous use for close to a decade now. I've actually got this entire blogspot site mirrored just so I can make absolute certain nothing ever happens to the posts.

Yeah, I also got an ODAC combo (amp and DAC sandwiched in an enclosure) in continuous use since it released way back when. The only annoyance is that there's probably something wrong with the USB cable, as it loses connection depending on how you twist it, so I may accidentally strike it and then spend a few minutes wiggling the connectors to get it back. The Micro USB connector choice didn't age too well, so I can't easily find a replacement with chokes :)

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