Martin Super D-18 Acoustic Guitar – The Cannon, Reimagined

Massive Mahogany Tone. Unprecedented Power.

For decades, the D-18 has been the secret weapon of flatpickers, songwriters, and studio musicians who prize clarity and a strong midrange. ¹ The Martin Super D-18 takes that iconic mahogany formula and supercharges it. By expanding the traditional dreadnought footprint, Martin has created a "cannon" that delivers the dry, woody character of a D-18 with a level of volume and bass response previously thought impossible for a mahogany guitar.

20% More Volume, 100% More Presence

The standout feature of the Super D-18 is the Super D-14 Fret body size. With a width of 16.375 inches (compared to the standard 15.625), this guitar boasts approximately 20% more internal air volume. This translates to a staggering increase in headroom and projection. If you’ve ever felt your acoustic guitar was getting lost in a mix or drowned out by a banjo, the Super D-18 is the solution. It offers a "chest-thumping" low end while maintaining the laser-focused note separation that mahogany is famous for.

The Perfect Blend of Woods & Bracing

The Super D-18 features a solid Sitka Spruce top paired with solid Genuine Mahogany back and sides. While rosewood (like on the HD-28) provides complex overtones, mahogany provides a "fundamental" tone—clean, honest, and punchy. To make this larger body vibrate with ease, Martin utilized Forward-Shifted Golden Era (GE) scalloped X-bracing. This allows the top to move more freely, giving you a highly responsive instrument that sounds "open" and vintage right off the rack.

Vintage Spirit, Modern Feel

Despite its "Super" size, the D-18 remains remarkably comfortable to play. It features Martin’s GE Modified Low Oval neck with a High-Performance Taper, ensuring that the reach feels natural whether you're playing rhythm or lead.

Heritage Appointments include:

• Old Style 18 multi-stripe rosette and black binding for a clean, understated look.
• Aging Toner on the spruce top for that classic "pre-war" golden hue.
• Abalone Old Style 18 fingerboard inlays and a script old-style headstock logo.
• Nickel Open Gear tuners with butterbean knobs for precise tuning and vintage appeal.

The Tone Tailors Difference

A guitar this powerful deserves a setup to match. At Tone Tailors, we ensure your Super D-18 is dialed in for your specific playing style. Whether you want a low, fast action for flatpicking or a bit more height to really dig into those bluegrass chords, our experts have you covered.

Specifications at a Glance:

• Body Size: Super D-14 Fret
• Top: Solid Sitka Spruce with Aging Toner
• Back/Sides: Solid Genuine Mahogany
• Bracing: GE-Scalloped, Forward-Shifted X-Brace (5/16")
• Neck Shape: GE Modified Low Oval
• Fingerboard/Bridge: Solid Ebony
• Nut Width: 1 3/4"
• Scale Length: 25.4"
• Case: Molded Hardshell Included

Experience the mahogany punch that fills the room. Visit Tone Tailors today to play the Martin Super D-18.