This is the unit I am running in my '19 that I PMed you for the CAN wiring locations. lol Unfortunately, I have yet to get it to work properly. I'm going to call in tomorrow to see if they can provide some assistance.
Opening a door will turn the unit on. Indicator light is yellow, indicating proper signal, and remote output will turn on after a few seconds. When I turn the car on, it turns off remote output so my DSP and amps turn off. If I turn off the car, open and close the door, and wait a few seconds, it will turn on the remote output again for about 5 minutes.
I plan on doing a full write up here of the system once I'm sure everything works as intended.
EDIT: Also, just to clarify, there ARE 12 channels of output on the analog side. Either way, use of crossovers would depend on your processing & amplification, not on the Zen-A2B. I'm using the TOSLINK output of the Zen, and still running active to all speakers. I've replaced all cabin speakers, ran new speaker wire, and removed the rear 6x9's in favor of (2) 10's in the trunk. The12 speakers are running active off (2) 6-channel amps and subs off monoblock. I have some photos on my Instagram, if you're intersted: https://www.instagram.com/atraxlabs
And a bit about the problems I'm having with the Zen: testing voltages show that when the unit is on but car is off, remote output is the same as battery voltage. When the car is on, it's only 11.38v. Trigger voltage of my DSP is >12v so it turns off when the car is started. I'm still going to call NavTV about it, but will probably just end up throwing in an SSR and moving on.