The Interstellar Tone Traveler has navigated a lot of Martin territory lately, but the GPC-13E Modern charts a course all its own — leaner, more contemporary, and built for players who want their acoustic to feel as modern as their playing. The Grand Performance Cutaway body is the secret weapon here: slightly smaller than a full Dreadnought but more projective and bass-forward than a 000, with a deep cutaway that opens up the upper register in a way that most acoustic players have simply never experienced before. It's a body shape that bridges the gap between acoustic intimacy and electric-style expressiveness, and paired with a solid spruce top over koa fine veneer back and sides, the tonal result is clear, shimmering, and beautifully balanced — koa's natural sparkle and warmth lending a distinctly tropical character to every note. The Natural gloss finish lets the materials breathe and speak for themselves without any toner or coloring in the way.

Everything about the GPC-13E Modern signals a guitar pointing forward rather than backward. Diamond-and-Squares Long inlays replace the traditional dot or snowflake patterns with something geometric and confident, while Ratio® skeletonized open-gear tuners bring precision and visual lightness to the headstock in a way that feels genuinely fresh. A single ring faux abalone rosette, faux abalone bridge pin dots, and white body binding complete the modern aesthetic without ever feeling gaudy or overdone. Martin E1 electronics and a built-in tuner make this stage-ready from day one, and the ebony fingerboard and bridge add the snap and definition to keep every note articulate no matter where on the neck you're playing. For the player who wants their acoustic to keep up with their vision — this is the ship.

Top: Spruce 
Finish Top: Gloss
Top Color: Natural 
Top Inlay: Multi-Stripe
Binding: White
Bridge Material: Ebony
Bridge Style: Sloped Modern Belly 
Bridge String Spacing: 2 5/32"
Bridge Pin Material: White Plastic
Bridge Pin Dots: Faux Abalone
Pickguard: Faux Tortoise 
Pickguard Inlay: None
Rosette: Single Ring Faux Abalone
Saddle: White Tusq
Saddle Radius: 16"
Body Size: GP-14 Fret Cutaway
Construction: Mortise & Tenon Neck Joint 
Back Material: Koa Fine Veneer
Side Material: Koa Fine Veneer
Body Finish: Gloss
Back Purfling/Strip: None
Back Inlay Material: None
Bracing Pattern: X-Brace
Brace Shape: Scalloped 
Brace Material: Spruce 
Brace SIze: 5/16" 
Heel Cap: Black 
Endpiece: None
Endpiece Inlay: None
Neck Shape: PA Profile
Neck Taper: High-Performace Taper
Neck Material: Select Hardwood
Neck Color: Natural 
Neck Finish: Hand-Applied 
Scale Length: 25.4"
Number of Frets: 20
Neck Joins Body: 14 Fret
Fingerboard Material: Ebony
Fingerboard Width at 12th Fret: 2 1/8"
Nut Width: 1 3/4"
Inlay Style: Diamonds and Squares Long 
Fingerboard Inlay Material: Faux Mother-of-Pearl
Fingerboard Binding: None
Headstock Shape: Solid 
Headplate Material: Brazilian Rosewood HPL 
Headplate Logo Style: Script Ink
Headplate Binding Material: None
Tuning Machines: Ratio Nickel Open Gear
Knob: Skeletonized Butterbean
Nut Material: White Corian
Electronics: Martin E1
Case: Martin Gig Bag