Well, I finally got myself a good Amp, and SVT3. Now, I know this isn't all tube, but it is my first amp with tubes in it at all, and I have a few questions about them. 1) Is it bad to overdrive the preamp? I know this is very bad for SS amps, but what about tubes? 2) Since I'm only useing my PV cab right now (it's not very loud and I have yet to figure out the impendence of my other cab), I'm turning it up almost all the way so I can be heard. is this bad? 3)Are the speakers suposed to move like that? I never noticed them moving quite so much before. Thanks.