I wanted to check the bias on my DSL40C and I found it was set at 30mA the one side was running a little bit hotter at about 32mA. The tubes in it are a big bottle looking tube which I think I have identified as EL34B they are Marshall logo VLVE00092. So anyway doing research when I biased my JCM2000 DSL50 I found that EL34's should be biased between 35 and 40mA I found that I like the amp biased to 35mA because it sounds a lot cleaner and less fizzy. So that made me want to check the bias on the DSL40C which I've already described above. So going by what I did with the DSL50 I set the bias to 35mA and it wasn't as clear as I wanted it so I went down to 30mA which is where it was when I first checked it. It still wasn't what I wanted so I went down to 25mA and it cleaned up a lot but I was curious and I went further and set it at 20mA. I think this is the sweet spot for me but is it bad to run the amp this far down? Assuming the tubes I have are the same as a regular EL34 it's been recommended that they be set between 35 and 40mA but I do not like the way the amp sounds at those settings. I'm probably going to do the EVH thing anyway and run the amp the way my ears like it but I'm curious what could happen if the amp is biased so cold. Although it may be within the recommended mA's for these kind of tubes and that's why they sound good at 20mA.