Is Master / Companion distinction still needed?

[rafal123]

So, from what I can work out, you have to configure both as a mono left and a mono right channel, no linkage?

I can understand that in your case @rafal123 with 3 monos it might be a simpler setup but for a dual mono setup, what's the problem with having a link cable?

Not really a problem, but a potential simplification. I have a long cable running from Right to Left and it was rather difficult to make it work for high resolution files. I needed impedance matcher to make it work and the cable is quite expensive.

You are right, you will be limited to Roon only, although I feed my turntable signal from my Center to Stereo pair through digital without Master/ Companion wiring.