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About the QB9
The Ayre Acoustics QB-9 is a premium digital-to-analog converter (DAC) designed to enhance audio fidelity. It features asynchronous USB input, supporting both DSD and PCM formats. The QB-9 is praised for its zero-feedback, fully balanced operation and the use of a minimum-phase digital filter. It offers balanced XLR and single-ended RCA outputs, with a maximum output level of 4 volts balanced. The device includes a proprietary re-clocking mechanism to eliminate USB jitter and uses opto-isolators to isolate the USB receiver from the audio circuitry, reducing noise pollution. The QB-9 Twenty version includes improvements such as a new JFET differential stage, AyreLock power supply regulation, and a custom ESS DAC chip for enhanced signal-to-noise ratio and spatial detail.
Specifications
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