I ordered a new Shure SLX wireless under the assumption that its frequency response would go down to 25 hz like the ULX series. WRONG! It only goes down to 45 hz, no bueno for 5-string. So it's getting refused and heading back to the dealer. Anyway, I had the opportunity to sit in with a group, and I used the bass player's GuitarBug, and it seemed to work fine, even though its published frequency response is 40 hz on the bottom. Anybody have any experience with the GB and a 5-string?