Hummm ...

I removed entire backing from 4X12 and cut out mid 1/3. (as discussed in earlier thread)

I'm running two ET-65s and two Vet30s, all 16 Ohms. of course.

Problem is is that when I ripped out backing of Cab, I didn't bother to annotate how to reconfigure.

the Amp has both 4 and 16 Ohm feeds. There isn't any info out there on this.

How do I configure the wiring, properly??

right now I've disabled Cab due to the fact that I believe I'm stressing out a boutique transformer(s).

http://www.manualslib.com/manual/491803/Ibanez-Is412ca.html

 

I'm not familiar with that cab ... but, I'd imagine it uses one of the common ways to do the 4/16 choice thing ...

Since you can't find that exact cab online ... see if you can find one with the same jack/plate config ... it'll probably be the same scheme.

For instance:

https://www.google.com/search?q=4x12+cabinet+4/16+ohm&tbm=isch&tbo=u&source=univ&sa=X&ei=TF6WU7qRPKzmsASN1oLQCg&ved=0CB8QsAQ&biw=1280&bih=904