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Question RE: Mac does not detect Ayre QB-9 DAC

I returned from vacation and powered on my audio system. It seems my MAC computer is not detecting my Ayre QB-9 DAC. I go into system preferences, select sound and the Ayre QB-9 is not listed as an output. I called my dealer and they are checking but no answers yet.

I removed and reconnected the USB cable and still no QB-9. Everything worked pefectly before I powered down. A few software upgrades were made but nothing looked strange. I re-booted the MAC several times but the QB-9 is not in the list. It seems the MAC is not seeing the QB-9.

Someone at the store suggested maybe my USB cable has failed. Any suggestions?
hgeifman
zd542
5,339 posts
 
Try a different usb port. You can also try plugging it into a different computer just to see if it tries to connect.
s1nn3r's avatar
s1nn3r
162 posts
 
Same thing happened to my Macintosh C48 but everything was back to normal after I unplugged the C48 and waited 60 seconds to power it back on.
aisip
84 posts
 
Have you checked the Audio MIDI setup?
hgeifman OP
2,113 posts
 
My dealer connected my Ayre QB-9 DSD DAC to their MAC computer and it also failed to detect the QB-9 DAC (using a different USB cable). This is an exact duplication of the problem I had using my MAC Computer. We checked the fuses and they were okay. The unit is being returned to Ayre for repair. They loaned me a Musical Fidelity M1 DAC. Estimated down time is TBD.

As suggested, we tried a different usb port and also plugged it into a different computer. And, we also checked the Audio MIDI setup. The QB-9 failed to operate in all cases. Thanks again for the suggestions.
hgeifman OP
2,113 posts
 
My Ayre QB-9 DSD DAC has been repaired by Ayre and I picked it up today.
It was shipped to the factory on May 6 and returned today, June 5. We tested it at the dealer to ensure it works. It does. I am very happy to get it back.
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