I finally broke down and put a piezo pickup in my Guild a while back. It really sounds good amplified. I had used one of those magnetic gu*t*r pickups in the soundhole occasionally. Now, I'm thinking of going the opposite direction on amplifying this thing. If I can't get enough volume to play without an amp, I might try those thomastik strings that are supposed to work with piezo pickups really well. I hear they sacrifice acoustic volume for really sweet amplified tone. I've had no problem being heard with my upright at all. Matter of fact, I think I could take the banjo pickers legs off at 20 paces!
Oh yeah, Experiment with where you pick that acoustic bass (closer to neck/closer to bridge/center of soundhole/etc) it can really affect your tone and volume in interesting ways.