The Martin D-18 is one of the most iconic acoustic guitars. Martin introduced the “style 18” models in the 1850s, and by 1902, they had launched larger models and their first steel-string guitars. All of this culminated in the creation of the Dreadnought series, with the D-18 becoming a legendary model, known for its rich, powerful sound.
Depending on the period in which the guitar was built, the specs can vary a bit. However, the D-18 usually utilizes a spruce top with a natural finish, mahogany back and sides, and a mahogany neck with a rosewood fretboard.