I cannot delete this thread but please ignore it because on double checking, I realize the existing 2017 through 2019 models likely do not have enough switches to implement a full all channel amp disconnection. The existing switches are wired to implement the existing amp assign functions, so while it should be able to disconnect the already affected FL, FR, SBL, SBR, and the height channels via FW update, but to disconnect the SL, SR and C channels, additional switches will be needed.