Yes!
There are three circuits for the power amp case, all switched to the respective amps by 24 volt relays. You can see the three relays and the 24 volt transformer to power the relay switches in this picture.
Here you can see the AC wiring, which is standard house wiring. You can also see the intake for the variable speed Fantec extractor fan. It is a very quiet fan, mounted a long way away from the intake.