CF Martin : Steel String Acoustic Guitars | Buy your D-16R Dreadnought Acoustic Guitar at Samash.com. We offer financing options! The original D-16 is already one of Martin's best-known dreadnought models, and with the D-16R they've given it a facelift, upgrading the tonewoods to a new level of sound. The back and sides are solid East Indian rosewood with the same solid Sitka spruce top, increasing richness and sustain. The solid Spanish cedar neck is mated to a great feeling solid Striped Ebony