I got the Radial StageBug SB-1 Active for my acoustic guitar with Baggs Element pickup. I bought it as an easy to carry backup DI box due to it's small footprint, and it also works great for Fender P-bass (passive pickup). It has every feature I need: switches for phase, pad, and ground lift. Case is heavy gauge metal (not sure if same gauge as full size Radial boxes...either way plenty heavy duty enough). Shoreline had it at the best price + free & fast shipping as always. Can't go wrong with this one.