RS GuitarThe round shoulder dreadnought is the competitors version of the dreadnought model of the same 1930s era with a deep rich bass and thicker sweet trebles. 24.75, 24.9 RS- The RS is the 12 fret round shouldered dreadnought that has considerable headroom when driven hard. The 1930's inspired model has a thick "tubular" low end and thick trebles.