I looked on the guys Facebook page and didn't see anything on amps.
Yep, it's not a real "manufacturer Page", but it's the only "connection" I have
You may want to ask him for some links?
Meanwhile, I found some posts of his:
There's also a retrofit amp for the Toaster, can't find in now.
So apparently I will not be able to use my power amp. I read that the Kab will be 4 ohms and the PB100 does not support 4 ohms. Oh well, I will just keep using "FRFR" (if only there really was a true FRFR) cabs.
Or, you might use two of them of build a 2x12"