Hello, I am not an expert, I have a Accuphase E-305 Intergrated Amp, I have connected it to a power amp (serving the E-305 as a pre-amp) and I have selected "separate" from the switch at the back of the E-305 (according to the instruction when it is used as a pre-amp, it has to be switched to "separate" from "normal").
Now, things are fine setting up this way - using the E-305 intergrated amp as a pre-amp connecting to a power amp (having switched to "separate")
However, I have tried switching it back to "normal" (having connected to a power amp) and it works just the same! I though it should not work this way...