MAGAZINEWith this type of transfer, the DAC determines the transfer clock with its precise clock - and not the PC with its jittered clock. That was 10 years ago. Since then, this DAC classic has been upgraded several times: Already in 2011 it was drilled out to 192 kHz clock and now Ayre offers a hardware upgrade for all existing QB-9s with the converter chip ES9038Q2M from ESS Technology, with which the device can now reproduce PCM data up to 384 kHz and DSD bit streams up to 11.3 MHz. Also new: the "Diamond" output stage, the "AyreLock" power supply technology and a new JFET differential amplifier stage. In Germany, the costs for the QB-9-Uprade is 1,690 Euro. The complete device cost 2800 Euro when it was launched on the market.
New Converter Chip
Hardware Upgrade for Ayre QB-9
It was one of the first D/A converters with asynchronous USB transfer from a PC: the QB-9 from Ayre Acoustics in Colorado.
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