BEOLAB RECEIVER 1 compatible with other brands? (meant for SUB) w Buchardt A500 + HUB

Hi All!

I want to get a Buchardt A500 with the HUB in the future, their own Sub is still not out yet, but I wan’t to integrate one with WISA certification.

The problem is, there are only 2 subs around which have WISA, BEOLAB something which is 4500 euro and a Klipsch 350 eup which is ported...