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About the QB9 Twenty USB
The Ayre Acoustics QB-9 Twenty USB DAC is an updated version of the highly popular QB-9 DAC, incorporating significant technological advancements from Ayre's top-tier R series. It features a Diamond output circuit that enhances musicality and bass response, a new JFET differential stage to lower the noise floor, and AyreLock power supply regulation for improved rendering of fine musical detail. The DAC uses custom Ayre Asynchronous USB technology to reduce electrical noise and proprietary reclocking to eliminate USB domain jitter. It supports PCM playback up to 384 kHz, native DSD capability up to DSD256 (4x), and HDCD decoding. The device has a six-layer board design for optimal circuit isolation and employs the ESS ES9038Q2M DAC chip for improved signal-to-noise ratio and spatial detail. The QB-9 Twenty maintains the same compact dimensions and weight as the original QB-9, with a simple front panel display indicating sample rate and a rear panel with balanced and single-ended outputs, USB input, and control switches. It is offered with a full five-year factory warranty and is considered one of Ayre's most refined USB DACs, delivering exceptional fidelity and realism for digital music playback.
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