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Perfectly proportioned, the QB-9DSD is destined to convert your computer into an uncompromised digital library of your favorite music. A simple USB connection engages the Asynchronous transfer mode ensuring accurately timed music with jitter levels over a hundred times lower than previous USB solutions. Ayre’s minimum phase digital filter and single-pass 16x oversampling technology release layers of musical resolution—uncovering the emotional soul of your music.

“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…”

– Pete Roth, Ultra Audio


  • Asynchronous transfer mode for USB input.
  • DSD or PCM input over USB.
  • Minimum phase digital filter.
  • Single-pass 16x oversampling.
  • zero-feedback, fully-balanced discrete circuitry.
  • Equilock circuitry for active gain devices.
  • Ayre Conditioner power-line RFI filter.
  • AyreLink communication system.


Frequency Response DC – 20 kHz (44.1 kHz sample rate)

DC – 22 kHz (48 kHz sample rate)

DC – 40 kHz (88.2 kHz sample rate)

DC – 44 kHz (96 kHz sample rate)

DC – 80 kHz (176.4 kHz sample rate)

DC – 88 kHz (192 kHz sample rate)

DC – 80 kHz (2.8224 MHz sample rate – DoP )

Signal/Noise 110 dB (unweighted)
Output Level 4 volts balanced, 2 volts single-ended
Input 1 USB

PCM 44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz, 192 kHz (up to

24 bits), DSD64

Dimensions 8.5″W x 11.5″D x 3″H

(21.5cm x 29cm x 7.5cm)

Weight 5 pounds (2.3 kg)


Ayre Digital Metamorphosis Interview

Ayre USB DAC White_Paper


UltraAudio_Ayre_QB-9“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.”
Peter Roth, Ultra Audio


Computer_Audiophile_Ayre_QB-9“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.”

Chris Connaker, Computeraudio.com




Stereophile_Ayre_QB-9“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.”

Wes Phillips, Stereophile





“I think the real story with the QB-9 DSD is how Ayre has taken an already very good sounding DAC, added more weight, body, and color along with what I’ll call DSD’s dimensional quality to come up with one musically satisfying DAC no matter what you play through it. Now that’s what I call an upgrade.”

Audio Stream




 It makes instruments and voices sound more real than other very good converters and has as natural a sound as the best turntables. Timing is not in quite that league but that again I suspect is a source issue, at the price the Ayre is a revelation.

The Ear – Jason Kennedy



Positive_Feedback_Ayre_QB9_DSDI can’t think of more fun that I’ve had in a really long time reviewing a piece of equipment—no matter the price—and I can highly recommend the QB-9DSD to anyone thinking of spending anywhere north of a few hundred dollars to south of about $10K to be able to play digital music files even if they have a MacBook Air and a decent headphone amplifier in a headphone-only system, or beyond.