My friend recently purchased a used Orange RK100. Now, it came with 6L6 tubes and I believe it comes stock with EL34 right? The reverb on the amp doesn't work. When he turns up the knob, his tone gets brighter. It works as a tone/treble knob. Is that in any way fixable?
Take it to the shop it should still be in warranty. And have them fix it
He bought it from a friend, and we were just curious as to what it could be. It's a '06 model.