So I do a lot of shows where I'm plugging my pedal board into a DI box (no amp). My pedal board is full and I don't need a DI box for all shows, so I'm looking for something I can use that will give me some tone control or preamp and is either passive or battery powered but can last a long time. I don't feel like trying to find two outlets for my pedal board for shows if possible. A lot of places where I forgo an amp have limited power on stage. Ideas? Or is this a pipe dream?