Hi,

Only the G68SL has the USB input. As the USB is not asynchronous, it isn’t considered very good and the suggestion would be to use a separate asynchronous DAC and feed a digital output from that into one of the D inputs on the G series processor.

USB inputs on Meridian components are only stereo and I’m not sure if you can send multichannel over USB? Not something i’ve ever looked into but happy to be corrected.

Given you current speaker set up (non-SL) an earlier G6x processor might be a better choice. G series processors can have some issues with their power supplies but that’s going a bit off topic.
Whatever processor you end up with, you should be able to upgrade you speakers gradually while retaining an analogue output to feed your D600’s

Multichannel from Bluray is usually set to pcm output in the source via HDMI. The HD621 will strip the pcm audio output from the video and output 3 (L/R, C/sub, surround L/R) digital channels to the G6x or 568.2mm processor.

Brian

Last edited by bxd; 2020-02-29 14:01. Reason: typo
Main: G65, MD600 Sooloos, MC200 Roon Core, MS600, 210, 218, UHD722, DSP5200SE, DSP5200HCSE, M6 & DSW.2
System 2: AC200 MS200, WiiM Pro+, M6.
Other: DSP5000 (96/24v1), DSP3300.