SIGMA GUITARS SDR-28MT LTD with Case
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Manufacturer Information
Sigma
https://www.sigma-guitars.com
hankins@sigma-guitars.com
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A "28-style" Dreadnought: The Spirit of Great Stage Acoustics
With its combination of torrefied spruce and solid rosewood, the SDR-28MT follows the tradition of high-end dreadnoughts designed to offer a wide dynamic range, broad spectrum, and strong projection. The choice of Madagascar rosewood, prized for its harmonic complexity, places this model firmly in the "big acoustic sound" approach, suitable both for pick playing and fingerstyle accompaniment.
For Which Guitarists and Styles?
The SDR-28MT is primarily aimed at intermediate to advanced guitarists seeking an expressive acoustic capable of handling energetic playing while remaining nuanced with softer attacks. The dreadnought format is particularly comfortable in folk, country, bluegrass, acoustic pop, and vocal accompaniment thanks to its solid low-end foundation. For fingerstyle, it works very well if you are looking for a wide and enveloping sound with present bass.
A Full-Bodied Tone, Driven by Selected Solid Woods
The torrefied solid Sitka spruce top provides a lively response, excellent "snap" on attack, and a sense of maturity from the first minutes of playing. Torrefaction also tends to stabilize the top and promote a quick opening of the tone, often achieving a very musical balance between precision and warmth.
The solid Madagascar rosewood (back and sides) enhances bass depth, extends sustain, and enriches harmonic content, giving width to chords and beautiful brightness in the upper spectrum. The ebony fingerboard and bridge contribute to a crisper attack and better definition, particularly appreciated on arpeggios and complex chords. Finally, the bone nuts favor vibration transmission and note clarity, resulting in a more articulated and dynamic sound.
Recommended Compatible Accessories
To preserve the lutherie of an all-solid acoustic guitar, a guitar humidifier and a hygrometer are reliable choices, especially during heating seasons. A clip-on tuner and a universal stand effectively complement the included soft case SSC-D.
Technical specifications
| Model | SDR-28MT |
| Format | Dreadnought |
| Top | torrefied solid Sitka spruce |
| Back and sides | solid Madagascar rosewood |
| Finish | natural gloss |
| Neck | mahogany |
| Fingerboard | ebony |
| Scale length | 25.4" / 645 mm |
| Nut width | 44.5 mm / 1.75" |
| Bridge | ebony |
| Nuts | bone |
| Tuners | Grover open gear chrome |
| Case | included soft case SSC-D |
Questions frequently asked
Is the Sigma SDR-28MT suitable for bluegrass and pick playing?
Its dreadnought body shape, torrefied solid Sitka spruce top, and solid Madagascar rosewood back provide strong projection and pronounced bass. This setup is especially well-suited for folk, country, and bluegrass.
What woods are used in the SDR-28MT LTD?
The top is made of torrefied solid Sitka spruce, while the back and sides are solid Madagascar rosewood. The neck is mahogany, and both the fingerboard and bridge are ebony.
What is the nut width of this dreadnought?
The nut width is 44.5 mm, or 1.75 inches, with a scale length of 645 mm (25.4 inches). Bone nuts contribute to note clarity and articulation.
Is a case included with the guitar?
A soft case SSC-D is included. To preserve an all-solid-wood instrument, it is recommended to use an acoustic guitar humidifier and a hygrometer, especially during heating seasons.
Is the SDR-28MT suitable for fingerstyle playing?
Thanks to the solid Madagascar rosewood, the response offers deep bass and extended sustain. The ebony fingerboard promotes precise attack on arpeggios. Chrome open-back Grover tuners ensure stable tuning.



