I attempted to do a search but as you all know it's a bit hard to search for things with short words. Basically I'm looking for an A/B box because I plan on using two basses and running them into a single amp. I assume this is what I would need to swap from one bass to another on the fly between songs without having to unplug and plug up when switching? Just wondering if there are any basic A/B boxes out there that you folks could suggest to me. I want something transparent and that will do the job hopefully without needing an addtional power supply. thanks!