Martin J-40 2025 Spec (132)

The Martin J-40 is a trusted standout in Martin’s acoustic lineup that makes an unforgettable statement in both sound and style. Its Jumbo body size combines a larger, tight-waisted shape with powerful projection, delivering resonant bass, shimmering trebles, and exceptional balance that suits any playing style. Handcrafted with a solid spruce top and solid East Indian rosewood back and sides, the J-40 boasts deep bass and rich overtones, creating a sound that’s as dynamic as its design. The satin genuine mahogany neck with a Golden Era (GE) Modified Low Oval profile, high-performance taper, and 25.4" scale length ensures smooth, comfortable playability. Luxurious details, including its abalone rosette and bound ebony fingerboard with hexagon inlays, enhance its timeless beauty. Complete with antique white binding, an ebony bridge with bone pins, and gold open gear tuners, the J-40 is a guitar you can trust to unleash the artist within. 

Top Material: Spruce
Finish Top: Gloss
Top Color: Aging Toner
Top Inlay Material: Multi-Stripe
Top Detail: None
Binding: Antique White
Bridge Material: Ebony
Bridge Style: GE Modern Belly - Drop in Saddle
Bridge String Spacing: 2 5/32"
Bridge Pin Material: Bone
Bridge Pin Dots: Abalone
Pickguard: Faux Tortoise
Pickguard Inlay: None
Rosette: Abalone with Multi-Stripe
Saddle: Compensated Bone
Saddle Radius: 16"
Body Size: J-14 Fret
Construction: Dovetail Neck Joint
Back Material: East Indian Rosewood
Side Material: East Indian Rosewood
Back and Side Finish: Gloss
Back and Sides Color: Natural
Back Detail: None
Side Detail: None
Back Purfling/Strip: Style 45 with Black Stripe
Back Inlay Material: Multi-Stripe
Side Inlay Material: Multi-Stripe
Bracing Pattern: Forward Shifted X-Brace
Brace Shape: GE-Scalloped
Brace Material: Spruce
Brace Size: 5/16"
Heelcap: Antique White with Multi-Stripe
Endpiece: Antique White
Endpiece Inlay: Multi-Stripe
Neck Shape: GE Modified Low Oval
Neck Taper: High-Performance Taper
Neck Material: Genuine Mahogany
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: Reduced Hexagon
Fingerboard Inlay Material: Abalone
Fingerboard Binding Material: Antique White with Multi-Stripe
Side Dots: Black
Headstock Shape: Solid with Square Taper and Diamond
Headplate Material: East Indian Rosewood
Headplate Logo Style: Block Inlay Golden Era
Headplate Binding Material: Antique White with Multi-Stripe
Tuning Machines: Gold Open Gear
Knob: Butterbean
Nut Material: Bone