I've seen one seven-string guitar. It was a nylon-string classic, played by Christopher Berg, a student of Aaron Shearer. Chris's guitar was made by José Oribé in San Diego. Chris said that someone had special ordered it from Oribé and then couldn't come up with the money. Chris did have the money so he bought it. I heard him do a concert with it. He played a fair amount of lute transcriptions where the extra bass string came in handy.

I have an Oribé classic. Six string. Very nice instrument.

But then, one can go for something like THIS. Eleven strings. Made by Georg Bolin, Swedish luthier. I'd love to get my hot little hands on one of these!

Don Firth