I want to tuberoll. :iamconfused: I am familiar with tube-rolling from high-fi tube amps, but my understanding with PRS guitar amps is that in order to swap something else in, one has to bias it to 30 (mV?), correct? So if one tube is working at 75% of its capacity (when biased at 30) and another is working at 90%, is it correct that the first one will give me more headroom (I.E. I can turn up the gain higher before I get distortion)? Or is that all in the preamp tubes? I'm more of an EL84 guy, I should probably just get a Vox (or a Vox clone), neh? None of these will "sound" like an EL84, will they?