“… 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