Martin J-40 Standard Series Acoustic Guitar

C.F. Martin Guitars

Legendary Martin Jumbo With a Tight Waist and Neck Profile Designed for Player Comfort

At Martin Guitars handcrafted instruments built with superior tonewoods and innovative designs represent the high standard for which they are revered. Standard Series guitars feature Sitka Spruce tops with Mahogany or Rosewood backs and sides, giving them a massive bottom end with articulate highs and balanced mids. Martin Standard Series guitars continue the tradition of vintage styling and elegant craftsmanship that have made playing a Martin an amazing experience.

The Martin J-40 acoustic guitar features a rare Jumbo body style with a tight waist designed for player comfort. Featuring the classic tonewood pairing of a Solid Sitka Spruce top with East Indian Rosewood back and sides, the Martin J-40 produces a bold sound with characteristic harmonic richness in the treble register and clear mids, making it excellent for accompanying vocals. The jumbo body size, with forward shifted X-bracing, paired with the Sitka Spruce top and East Indian Rosewood back and sides delivers extraordinary volume and projection without sacrificing Martin’s characteristically balanced tone in the pursuit of volume.

This Martin J40 features a Mahogany neck with Martin’s modified low oval neck shape and high performance taper, and a bound 20-fret Ebony fingerboard that is extremely comfortable and easy to play on, and is exquisitely decorated with abalone reduced hexagon inlays. The low oval neck is thick enough for chunky chords, and enough silkiness for more technical playing.

The Martin J-40 features a variety of top tier appointments that give the J-40 a classy and luxurious feel including a classic Martin Style 45 multi-stripe Rosette, followed by top, back, and side inlays, and a Style 45 pattern along the purfling. The select Ebony fingerboard is topped with a compensated bone nut and a headstock featuring abalone block-style script and gold open-gear tuners.


  • Body Size: J-14 Fret
  • Finish Top: Gloss
  • Construction: Dovetail Neck Joint
  • Back & Side Finish: Gloss
  • Bracing Pattern: Forward-Shifted X-Brace
  • Scale Length: 25.4"
  • Brace Shape: Scalloped
  • Fingerboard Width At Nut: 1 3/4''
  • Top Material: Sitka Spruce
  • Neck Shape: Modified Low Oval
  • Back Material: East Indian Rosewood
  • Neck Taper: High-Performance Taper
  • Side Material: East Indian Rosewood
  • Electronics: Optional
  • Recommended Strings: Authentic Acoustic Lifespan® 2.0 Medium - 92/8 Phosphor Bronze MA550T
  • Top Color: Aging Toner
  • Bridge Style: Modern Belly - Drop in Saddle
  • Binding: Antique White
  • Bridge String Spacing: 2 5/32"
  • Top Inlay Material: Multi-Stripe
  • Bridge Material: Ebony
  • Bridge Pin Material: White Plastic
  • Pickguard: Faux Tortoise
  • Bridge Pin Dots: Abalone
  • Pickguard Inlay: None
  • Saddle: Compensated Bone
  • Rosette: Abalone with Multi-Stripe
  • Saddle Radius: 16"
  • Brace Material: Sitka Spruce
  • Brace Size: 5/16"
  • Back Purfling/Strip: Style 45
  • Back Inlay Material: Multi-Stripe
  • Heel Cap: Antique White with Multi-Stripe
  • Endpiece: Antique White
  • Side Inlay Material: Multi-Stripe
  • Endpiece Inlay: Multi-Stripe
  • Neck Material: Genuine Mahogany
  • Fingerboard Material: Ebony
  • Finish Neck: Satin
  • Fingerboard Width at 12th Fret: 2 1/8''
  • Neck Color: Dark Mahogany
  • Fingerboard Inlay Style: Reduced Hexagon
  • Number of Frets Total: 20, Neck Joins Body At14th Fret
  • Fingerboard Inlay Material: Abalone
  • Fingerboard Binding Material: Antique White with Multi-Stripe
  • Side Dots: Black
  • Headstock Shape: Solid with Square Taper and Diamond
  • Tuning Machines: Gold Open Gear
  • Headplate Material: East Indian Rosewood
  • Knob: Butterbean
  • Headplate Logo Style: Block Inlay
  • Nut Material: Bone
  • Headplate Binding Material: Antique White with Multi-Stripe
  • Case: Ply Hardshell
  • Left Handed Availability: Yes
  • Label: None
  • Pleked: Yes

Rare Martin Jumbo Style With Premium Appointments Worthy of Players who are Passionate About Their Music

With the Martin J-40 Standard Series acoustic guitar you get a tight waisted Jumbo acoustic  where tone and performance match its exquisite beauty. Featuring the classic tonewood combination of Sitka Spruce and East Indian Rosewood, a Mahogany neck with a low oval shape and a high performance neck taper, bound ebony fingerboard with abalone inlays and a Style 45 striped Rosette, the Martin J-40 is a beautiful handcrafted Jumbo style acoustic guitar with a distinct tone, delivering plenty of volume and beautiful projection without booming or drowning out the vocals. Pairing refined looks with amazing performance makes this an ideal Jumbo acoustic for those whose musical passion demands an instrument that will perform at the highest levels.

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