Sigma SDM‑18 – All‑Solid Mahogany Slope‑Shoulder Dreadnought Acoustic Guitar

The Sigma SDM‑18 is a vintage-inspired slope‑shoulder dreadnought acoustic guitar crafted entirely from solid mahogany, delivering a warm, punchy midrange and rich tonal depth. This all-mahogany build produces natural compression and focused resonance, perfect for blues, folk, and fingerstyle play. With a low-profile mahogany neck, Micarta fingerboard & bridge, and bone nut & saddle, it offers smooth feel and sustain. Vintage aesthetics, lightweight comfort, and robust projection combine for a classic playing experience. Finished in satin and fitted with chrome die-cast tuners and D’Addario EXP16 strings, the SDM‑18 blends traditional tonewoods with modern craftsmanship and reliability.

Specifications

Body Size: D-14 Fret
Construction: Dovetail Neck Joint
Top: Solid Sitka Spruce (AA Grade)
Back & Sides: Solid Mahogany (AA Grade)
Neck: Mahogany, Low Profile
Nut & Saddle: Bone
Fingerboard & Bridge: Ebony
Scale Length: 25.4” (645 mm)
Neck width at nut: 1-3/4” (44,5 mm)
Truss Rod: Two way Truss Rod
Tuning Machines: Grover Nickel Open-Gear w/ Butterbean Knobs
Finish: High Gloss
Strings: D´Addario EXP16
Softshell Case: SSC-D included