ASUS Xonar DX soundcard for $60 -> Wow!

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I recently bought an old ASUS Xonar DX soundcard for $60. The quality is really incredible. It is close to the quality of expensive audio measurment systems.
It actually has only 2 small errors: At 192 kHz sampling the frequency response is slightly bent and at 3 kHz is has a small harmonic. Otherwise, everything is perfect!

THD : 0.00071 %
THD+N: 0.00084 %

I have attached some Rightmark tests.
 

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Yes, they're very good for the money. Used one for years. Blew one up (don't ask) and immediately bought another. Once in a blue moon I get a driver issue (or stuck relay), nothing a reboot can't fix. Trouble is they haven't made them for years but there seems to be a good few on evilbay.
 
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