Do anyone no if the Up2Stream Plate Amp - Multiroom Wireless Plate Amp can be reconfigured so it is a bi-amp mono plate amp? I don’t know what DSP is in the amp but if it has assignable channels and crossovers then it might be possible.
This would be my first choice rather than trying to run a speaker wire from the active to the passive speaker, defeats the whole purpose of the wifi connection with a wire now required to run in odd places.