Excellent condition Ayre QB-9 supporting 24/192 and DSD. This is Ayre's most recent version of their highly rated Asynchronous USB DAC. It was updated by Ayre to DSD and has performed flawlessly.
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A few reviews of this superb DAC:
“… I think this is one of the most transparent and realistic sounding DACs available. It makes instruments and voices sound more real than other very good converters and has as natural a sound as the best turntables” Ayre QB-9 DSD
– Jason Kennedy, The ear
“…one thing I can say for sure is that is that all if you want is to listen to really amazing-sounding music, pretty much no matter the genre nor format, and you're willing to invest $3250 into the QB-9DSD, you will not feel disappointed. This is truly going into the audio hall of fame.” The Ayre QB-9DSD and the State of the Art
– Andy Schaub, Positive Feedback
"Providing significantly greater performance than any similarly or lower-priced alternative, and undoubtedly one of the best computer-audio DACs now available regardless of price, the QB-9 is a watershed component in this watershed year. It is what it is, nothing more, nothing less: a USB DAC unabashedly focused on making the best possible computer-audio sound for the least amount of money." Ayre Acoustics QB-9 USB Digital-to-Analog Converter
– Peter Roth, Ultra Audio
"The QB-9 asynchronous USB DAC is Ayre's first entry into the USB DAC market. Based on performance Ayre has hit a home run on its first plate appearance." Ayre Acoustics QB-9 Asynchronous USB DAC Review
– Chris Connaker, Computeraudio.com
"I'm sure the QB-9 isn't Ayre Acoustics' or Gordon Rankin's last thought on getting digits out of computers, but they've set themselves a pretty darn high bar for the future. I can hardly wait." Ayre Acoustics QB-9 USB DAC
– Wes Phillips, Stereophile