The Martin Super D-18 takes the legendary Style 18 Dreadnought to the next level. With 20% more internal air volume than a standard Dreadnought, this Super D body delivers thunderous bass, increased volume, and extended dynamic range—all while keeping the iconic silhouette intact. Solid genuine mahogany back and sides add warmth and punch, while the spruce top ensures clarity and projection. Forward-shifted Golden Era scalloped X-bracing, as featured on the Modern Deluxe Series, makes every note responsive and powerful. Appointments like black binding, abalone dot inlays, and a satin-finished neck keep the look classic and the playability smooth. Paired with an ebony bridge and fingerboard, the Super D-18 is a bold evolution of an acoustic icon—built for players who want to be heard.

Full specs are as follows:

Super D-14 Fret body size
Genuine Mahogany back and sides
Spruce top with Aging Toner top color 
GE Modified Low Oval neck with High-Performance Taper
1 3/4'' fingerboard width at nut
Hardshell case
Recommended Strings: Authentic Acoustic Lifespan® 2.0 Guitar Strings Phosphor Bronze - Medium 

Top

Top Material: Spruce 
Finish Top: Gloss 
Top Color: Aging Toner 
Top Inlay Material: Multi-Stripe 
Top Detail: None 
Binding: Black 
Bridge Material: Ebony 
Bridge Style: GE Modern Belly - Drop in Saddle 
Bridge String Spacing: 2 5/32" 
Bridge Pin Material: Ebony 
Bridge Pin Dots: None 
Pickguard: Faux Tortoise 
Pickguard Inlay: None 
Rosette: Old Style 18 Multi-Stripe 
Saddle: Bone 
Saddle Radius: 16"        

Body

Body Size: Super D-14 Fret 
Construction: Dovetail Neck Joint 
Back Material: Genuine Mahogany 
Side Material: Genuine Mahogany 
Back and Side Finish: Gloss 
Back and Sides Color: Dark Mahogany 
Back Detail: None 
Side Detail: None 
Back Purfling/Strip: Style 18 
Back Inlay Material: None 
Side Inlay Material: None 
Bracing Pattern: Forward Shifted X Brace 
Brace Shape: GE-Scalloped 
Brace Material: Spruce 
Brace Size: 5/16" 
Heelcap: Black 
Endpiece: Black 
Endpiece Inlay: None          

Neck

Neck Shape: GE Modified Low Oval 
Neck Taper: High-Performance Taper 
Neck Material: Select Hardwood 
Neck Color: Dark Mahogany 
Finish Neck: Satin 
Scale Length: 25.4" 
Number of Frets Total: 20 
Neck Joins Body At: 14th Fret 
Fingerboard Material: Ebony 
Fingerboard Width at 12th Fret: 2 1/8'' 
Fingerboard Width at Nut: 1 3/4'' 
Fingerboard Inlay Style: Old Style 18 
Fingerboard Inlay Material: Abalone 
Fingerboard Binding Material: None 
Side Dots: White        

Headstock
Headstock Shape: Solid with Square Taper 
Headplate Material: East Indian Rosewood 
Headplate Logo Style: Script Old Style Overlay 
Headplate Binding Material: None 
Tuning Machines: Nickel Open Gear 
Knob: Butterbean 
Nut Material: Bone      
 
Misc
Case: Hardshell 
Label: None 
Electronics: No 
Left Handed Availability: true 
Pleked: true