Folk Guitar

Martin Guitars 5 28 TERZ The Martin 5-28 Terz revives a companion guitar tuned in minor thirds. Its spruce top and solid Indian rosewood back produce a brighter tone. Modified Low Oval neck, ebony fingerboard, hard case included.

ARTICLE N° 126602
Martin Guitars - 5 28 TERZ Martin Guitars - 5 28 TERZ
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3 703,33 € excl VAT
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Martin has brought back a model that has disappeared from the current catalogue: the 5-28 Terz, a companion guitar tuned a minor third above standard tuning, to G-C-F-A♯-D-G rather than E-A-D-G-B-E. This offset octave gives the instrument a distinct, higher tone that complements a classical guitar played in standard tuning, whilst still allowing for standard tuning.

The 5 Terz 12-Fret body is the smallest in Martin’s current range, with a scale length of 21.38 inches, which shortens the distance between the frets under the hand. Beneath the top, a non-scalloped X-bracing made from 1/4-inch spruce absorbs the tension inherent in this higher-pitched tuning.

The ebony fingerboard has a 16-inch radius and features 18 frets, with Style 28 mother-of-pearl inlays on the neck. The 1.75-inch bone nut sets the string spacing, and the Modern Straightline Size 5 ebony bridge transmits the vibration to the top.

The nickel Butterbean-knob tuners maintain the Terz tuning without any unnecessary play, in keeping with period fittings. The Authentic Acoustic Lifespan 2.0 phosphor bronze strings, in Custom Light gauge, come factory-fitted and allow the bass to breathe without overpowering the treble.

The guitar comes in a hard case supplied with the instrument, and is also available in a left-handed version. Martin covers the model with a limited lifetime warranty and introduced it to the catalogue in 2026, as a nod to an early twentieth-century silhouette.
Scale length
 544,00 mm (21,42")
Instrument size
 Short scale (<34")
Finish
 Brilliant
Top material
 Spruce
Side material
 Rosewood
Back material
 Rosewood
Neck material
 Selected hardwood
Fingerboard material
 Ebony
Fingerboard radius
 406 mm (16,00")
Number of frets
 18
Nut width
 44,45 mm (1,749")
Tuning machine
 Open tuners
Hardware color
 Nickel
Bridge material
 Ebony
Color
 Natural
Assembly
 Set neck
Packaging
 Single unit
Number of strings
 6
Case or cover included
 Hard Case
  • Brand & Model name: Martin 5-28 Terz
  • Instrument: Acoustic guitar
  • Type: Acoustic folk guitar
  • Series: Standard Series
  • Artist: Not specified
  • Manufacturer’s reference: 5-28 Terz
  • Country of manufacture: Not specified
  • Colour: Natural
  • Body finish: Gloss
  • Body shape: 5 Terz 12-Fret
  • Neck joint: Glued-in neck, dovetail joint
  • Scale length: 21.38" (543.05 mm)
  • Top: Spruce, gloss finish, ageing toner
  • Centre block: Not specified
  • Binding / Top: Antique white
  • Bridge: Ebony, Modern Straightline Size 5
  • Tailpiece: Not specified
  • Pickguard: None
  • Back & sides: Solid Indian rosewood
  • Binding / Back: Antique white
  • Neck: Selected hardwood
  • Neck finish: Satin
  • Neck profile: Modified Low Oval
  • Truss rod: Not specified
  • Fingerboard: Ebony (official Martin source)
  • Radius: 16" (406.40 mm)
  • Number of frets: 18
  • Fret type: Not specified
  • Fretboard inlays: Style 28, mother-of-pearl
  • Side inlays: White dots
  • Nut width: 1.75" (44.45 mm)
  • Nut material: Bone
  • Headstock shape: Solid, square taper & diamond
  • Tuners: Nickel, open-backed, Butterbean knobs
  • Pickup configuration: None
  • Neck pickup: None
  • Middle pickup: None
  • Bridge pickup: None
  • Pickup covers: Not specified
  • Toggle switch: None
  • Potentiometers: None
  • Capacitors: None
  • Potentiometer knobs: None
  • Output: None
  • Hardware finish: Nickel
  • Strings: Authentic Acoustic Lifespan 2.0, phosphor bronze, Custom Light
  • Supplied with: Hard case
  • Body size: 5 Terz 12-Fret
  • Construction: Dovetail neck joint
  • Back & sides finish: Gloss
  • Back & sides colour: Natural
  • Back inlay: None
  • Side inlay: None
  • Back purfling: Style 28 with black band
  • Back inlay: Multi-Stripe
  • Side inlay: None
  • Bracing: X-Brace
  • Brace shape: Non-scalloped
  • Bracing material: Spruce
  • Bracing thickness: 1/4" (6.35 mm)
  • Endpin: Antique white
  • Endpin inlay: Multi-Stripe
  • Neck colour: Dark mahogany
  • Neck-to-body joint: 12th fret
  • Heel: Antique white
  • Fretboard binding: None
  • Headplate: Indian rosewood
  • Headstock logo: Old Style Script Overlay
  • Headplate binding: None
  • Headstock inlay: Not specified
  • Tuning machine knobs: Butterbean
  • Soundboard inlay: Multi-Stripe
  • Soundboard detail: None
  • Soundhole rosette: Style 28 Multi-Stripe
  • Peg material: Bone
  • Bridge pin inlays: Faux tortoiseshell
  • String spacing at the bridge: 2 5/32" (53.18 mm)
  • Nut radius: Not specified
  • Electronics: None
  • Left-handed version available: Yes
  • Case: Hard case
  • Warranty: Limited lifetime warranty
  • Tuning: Terz, a minor third above standard tuning
  • Terz tuning: G-C-F-A♯-D-G
  • Standard tuning: E-A-D-G-B-E possible
  • Series: Standard Series
  • Body size: Smallest current guitar in the Martin range
  • Year of introduction: 2026
  • Weight: Not specified
The Size 5 body style dates back to the brand’s early years and remains the oldest Martin body style still featured in the catalogue. Several artists have played models from this range, including Marty Robbins, Bobbie Gentry, Dolly Parton, Sting, Billy Corgan, Tony McManus and John Mayer. The 5-28 Terz builds on this heritage with a contemporary interpretation of the body style. Its Terz tuning harks back to an ancient tradition, with a pitch range a minor third above standard tuning. This approach gives Martin a unique place in the history of American acoustic guitars.

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Martin Guitars - 5 28 TERZ
3 703,33 € excl VAT