@Fosi Audio
These days, it is often more comfortable managing power through smart plugs than cascading 12V triggers.
I also wanted to control the ZA3 through a smart plug, but I read a thread that said if you cut power to an amp that is on and then reapply power, the amp will be in a powered down state.
In order to power up the amp in that state again, I'd have to hold the knob down for a few seconds, and if I did, it would very likely change the volume that was matched to the other when using it as a dual mono.
Is this a difficult thing to fix? An easy to change mono/stereo switch is fine with me, but this could be a deal breaker for me.