The COS Engineering D10 V2 is a DAC/preamp/headphone amp built around dual Burr Brown PCM1792 chips per channel, using a precision relay-controlled resistor array for volume and offering a full set of digital inputs including USB, AES/EBU, and I2S over HDMI. This ex-demo unit includes the optional Roon Ready streaming module, supporting wired or wireless connectivity with UPnP/DLNA compliance, MQA decoding, and direct access to Tidal, Spotify, Deezer, and Qobuz.