You surely noted that I kept quiet about nthis topic for quite some time, despite your requests.
The simple reason is that I didn't find the time to fully analyse this setup in practice, even less come up with a realiably repeatable solution. There's a BK XLS200-FF sitting in my bedroom, but apart from some basic tests of the WiiM Amp's sub output it didn't get any use so far. I simply don't have much use for it in this setup, so I can't promise when time might allow further experiments.
There's also the WiiM Amp Pro in the living room waiting for further comparison including some measurements. Too many amps, too little time.
