I have a small Fender Champ tube amp from 1967 or 1968 that I carry to gigs and open mics. I usually plug my guitar into the P.A., but play harp through the Champ. I don't like being restricted by a sound guy who doesn't understand amplified harmonica. > > Thank you to all who have responded so far. The info has been very helpful and informative. > -JR >