I'm working on building a piezo pickup to sit under the bridge, and as I get closer to completion (Hopefully Monday), I'm getting closer to facing the trouble of whether or not I will need something else in the signal chain for it to sound good. I was given a sort of informal commission to build a piezo pickup for the DB used in jazz band. I'm hoping to have it ready to play by Monday, so I need to know very soon if I will need some sort of buffer or preamp for my bass. It will be going through a Crate keyboard amp through an input with a +10db boost (The other 2 channels are being used.) I found a cheap buffer design that I could pick up at Radio Shack for about $10, but I need to know if I'll need it. Can anyone give any advice on this, or is it just one of those things I won't know until I try it? Haste in replies would be greatly appreciated.