I have a cheap beater acoustic guitar that I bought for $39 to use on campouts. I bought it when a local music store sold out to Guitar Center a year or two ago. It actually sounds pretty good - it's better than a lot of $150-200 starters I've heard.
At any rate, the sound indoors was good, but outdoors it seemed pretty lame to me, though others said it sounded good to them. Then I saw a guitar online with a second soundhole - a player's soundhole. It was put on the upper side of the guitar about where the electronics are often put on acoustic-electrics. It seemed to make sense. Here's the site I saw it on...I used to take lessons from this guy.
So after a little thinking about it, I decided to try. A quick trip to Home Depot for a 1 1/2 inch hole saw for the drill and about 3 minutes of drilling and sanding and I was done.
The results were interesting. When played outdoors, it was not appreciably louder, but the sound was definitely fuller and richer to me. The overtones that were being lost before were all there. I wouldn't have the guts to try it on one of my Martins, but the operation was a success on the camp guitar.
Has anyone seen any other guitars with soundholes like these?