Yup, it's pretty simple. There's a clean boost and A/B/C &Y inside. There's a 1/4" input on the front, and 7 on the back. There are also on/off toggles on the front. It looks like this:
How does your switching system deal with switching the signal ground to only the selected amp to prevent hum, and does it present a dummy load to the two amps that aren’t powering the cab? Just curious how you’re doing this without potential ground loops and damage to the amps (by running them without a load)?