Gaf,

I'm almost positive you will need an MQA decoder (in a processor or audio endpoint). Right now, only the 818v3, 808v6, Explorer2 and Prime headphone amp can do the decoding. I don't think the speakers can do the decoding on their own.

And, I'm afraid the G68 is unlikely to ever get an upgrade to do the decoding. I don't think it has the processing power, so firmware won't do the trick.

Sorry

Living room: 818v3, Audio Research D150, Maggie 1.6
A/V room: 861v8, DSP7200SE L/R/C, 4x DSP320 surrounds, ID41 + Roon, UHD722, Prime+PS