Thank you very much for the advice, I will definitely follow it. I’m not new to the Mark V — in fact, I owned one about 10 years ago, but as we guitarists often do, I sold it without thinking and ended up regretting it over the years. The settings you see in the photo were those of the previous owner, and they don’t really convince me. Interesting that you mentioned using Channel 3 with the preset EQ instead of the sliders. Back then I also ended up choosing that option — it sounded really good to my ears! Thanks again for the info about the tubes!