Charles Hansen has been discussing the QB-9 at some length in the forums over at Audio Asylum. Late April release was the last word, I think. Ayre also has some technical material up on their Web site discussing the asynchronous USB implementation that's the DAC's big selling point.
I heard one today - with a mac laptop, ayre integrated, and thiel 1.6 speakers. I was amazed by the sound. Heard new new information, texture and clarity in a recording I've listened to hundreds of times.
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