Transmitter 1 in 2.1 mode - cutover frequency - subwoofer with BL3's

I am contemplating adding a BL subwoofer to an Essence setup with two BL3's connected via wisa transmitter/receiver 1 and have been wondering the following options/questions:

1) BL2/BL11 (connected via receiver 1): should the bass management be handled by the Transmitter 1 or the BL2/11 (they also have internal bass management)? I would assume you have to let the transmitter 1 do the job and that you cannot properly use the BL2/11 internal bass management (ie by the following connection: transmitter 1-> Bl2/11 (wirelessly via receiver 1) -> BL3's (wired to BL2/11)).

2) If you have to use transmitter 1 for bass management

what cutover frequency is applied and does it (theoretically) affect the choice of subwoofer? I.e is the filtered subwoofer signal sent from transmitter 1 to the sub better suited for BL2 or BL11 (or BL19) - or is it really no different from a wired setup where the BL2/11/19 handles the bass management?

Perhaps some of you have experimented with this and have answers/suggestions.

Br