Anything wrong with PS Audio DirectStream DACs?


I'm counting right now 19 (nineteen) PS Audio DSD DACs for sale (new and used). Strange. Some second owners also selling... The reviews are unanimously stellar.

I wonder why.
cbozdog
original version reviews start summer 2014. many companies do  hardware updates without changing model designation, not sure if PS has done this or not...
Beauty of firmware is avoid constant changing hardware.  

Funny @audiotroy description of firmware .  CLUELESS!!!!!
If you want to run directly to your amps, one thing to be careful of with the DS is the relatively low output voltage.  I don't have a pre and that was a problem for me.  During my demo I had to use it on the high voltage setting and still ran out of range if I wanted to listen loudly.  The noise floor also becomes much more evident when listening on that setting.  
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