Aside from its visual beauty, Sinker Mahogany seems to add some horsepower in the low midrange, adding to the overall projection and power of the guitar.

Have you wished Martin made a D-18 Authentic with Sinker Mahogany and an adjustable truss rod? You're in luck. New for 2025, and limited to 50 guitars, the Martin Custom Shop D-18 1937 Sinker Mahogany boosts the standard variant of the model up the ladder with the addition of beautiful Sinker Mahogany back & sides! (Note also that these guitars do *not* have the Stage 1 aged finish.) What's the difference? Aside from its visual beauty, Sinker Mahogany seems to add some horsepower in the low midrange, adding to the overall projection and power of the guitar. This lifetime D-18 is priced with a 5-ply Martin hardshell case.