There's one more important thing I forgot to mention about the Tube/SS rectifier switch. An additional benefit to having this switch is that if the tube rectifier goes out for some reason, you can switch to the SS rectifier and be good to go. This actually happened to me at a show one time with the RC30. At the time, I could only get my hands on a cheaper GZ34 rectifier tube and that's what was in the amp. I went through soundcheck without an issue, but when it was time to start the show, I flipped the standby switch and there was no sound. I knew right away in my head that the cheap rectifier tube had blown. I quickly switched to the SS rectifier and the amp came back to life and I proceeded to play an almost 4 hour show without any issue. Afterwards, I replaced that bad rectifier tube with a more robust one and haven't had an issue since.
