Fascinating topic. I found this after doing this myself and thought to myself “I wonder if anyone else has tried this”?
I’m prototyping a speaker design (for my own consumption) and my analog active crossover hasn’t shown up yet (keeping this one analog - Marchand) so in the interim, I thought to throw together two Roon endpoints as a group and use DSP to create two crossover points, a simple LP and HP 36dB/oct.
So far so good, it’s working and keeping music in sync to the best of my awareness. Lots of moving pieces here so I’m sure it’s not perfect by any means.
To do this right one should use two identical endpoints with identical DAC’s so that their capabilities aren’t hindered by each other, as it is in my situation, but it’s tiding me over until my crossover shows up.