+1 - Once at a backyard party that I attended, a Spanish band was hired to play. The bassist had one of those HUGE acoustic bass guitars and I was pleasantly surprised at how he could still be heard along with the other guys playing guitar, mandolin, trumpet and singing.
It's a hopeless quest - give it up. Unless you're going to carry around one of those Mexican guitars that are the size of a small automobile, you'll never be satisfied with the volume.
