The Martin Jumbo design combines the M-size silhouette with a Dreadnought-size depth to the sides, making for a cavernous sound chamber for room-filling tone that is nicely balanced yet robust. This is the favorite choice fingerpicking bluesman Stephan Grossman, songwriter Michael Nesmith, and of course the Indigo Girls, whose matching black J-40s look awesome on stage and sound excellent on their albums.
