Martin D-45 w/caseMartin D 45 w Case The D 45 sits at the very top of Martins Standard Series a flagship dreadnought built with premium tonewoods, ornate appointments, and the kind of projection and balance only a perfectly voiced large body acoustic can deliver. Its Sitka spruce top and East Indian rosewood back and sides produce a powerful, resonant voice with deep bass, clear trebles, and rich harmonic complexity. Abalone pearl borders the top, back, sides, rosette,