ok, I need a small amp... preferably tube based with XLR outputs, as well as a small driver for use as a monitor/pre-amp for my AEB. I'd like to have it be battery operated , as well... So, I think I'll build it... Bass it off the old Fender Bassman 30 (I have the schematics for it) So my main questions: 1) What voltage should the batter run at? I'm nothtinking I'm going to pop soe D-cells or 9volts.. I'm thinking a NiMH power cell. I know I will probably need some custom transformers to go from the battery voltage to the voltage levels of the tubes. 2) I'll def. need to put a balancing transformer for the XLR. do I want to do that between pre-amp and power amp (before the phase splitter, I'd assume), or since I'm only running 30 watts, do I do it after the power stage before the speaker and just pad the output? 3) I'm thinking of a 8-10" neo driver to save on weight. Should the cab portion be sealed? Ported? Any other thoughts?