This week I will be getting a BNC to RCA digital cable to plug into my K-01X and be able to see if that makes an even bigger improvement using Tidal through the Lumin. I will still have to play the MQA's through the XLR's
If you use the Lumin D2 digital output, you can set the MQA mode to Digital Output. This will do the MQA Core decoding (first unfold) to 88.2kHz or 96kHz to BNC-SPDIF. (Note that analog outputs will be muted when playing MQA this way.)