MATRIX Element M2 ES9028PRO DAC & Headphone Amplifier & Music Streamer
Douk Audio U2 PRO XMOS XU208 Digital Interface, USB to TOSLINK Coaxial/Optical/HDMI IIS Audio Adapter, for DAC/Preamp/Amplifier, Support PCM & DSD256: Amazon.com: Industrial & Scientific
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At Long Last! Listen To Your (Physical) SACDs Through an Outboard DAC - Reviews - Audiophile Style