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Sigma RM-140E+ Cone Resonator

With Tesla Pickup and Volume and Tone Controls


Resonator guitars such as this Sigma RM-140E+ pack some serious punch and have a distinctive tone beloved by bluegrass and blues musicians.

The metal cone on the front of the guitar is responsible for that uniquely loud, cutting tone that works so well for blues, bluegrass, country, and especially for slide playing. The mahogany construction of this resonator's body gives it a slightly warmer, mellower, and all together a less harsh tone than you'd find on a metal bodied resonator. The RM-140E+ has a round neck profile and can therefore be played in the same position you would with a standard acoustic guitar.

An added benefit of this resonator is the built in Tesla pickup in the neck position and built in volume and tone controls meaning this guitar is already set up to play live through and amp as well as acoustically!

Join the Sigma family

Sigma Guitars was launched in 1970 and has since established an excellent reputation amongst musicians. They produce outstanding quality guitars with solid construction and amazing sound quality. Sigma pay their undivided attention to every step of the construction process with specially trained staff in the most efficient guitar factories in China.

Sigma guitars are very popular. There are forums, websites and fan pages dedicated to them and its rare to see a second hand one on the market. All of that speaks volumes about the quality and care that goes into making them and how well they play and with a wide range to choose from you're sure to find a guitar that works for you. 


  • Body Size: Cone resonator 14-Fret
  • Construction: Traditional Stick-Through
  • Top: Mahogany
  • Back & Sides: Mahogany
  • Neck: Mahogany, Round Profile
  • Nut & Saddle: Bone
  • Fingerboard: Micarta
  • Scale Length: 24.75” (628 mm)
  • Neck width at nut: 1-3/4” (44,5 mm)
  • Tuning Machines:
  • Grover nickel Open-Geared w/ Butterbean knobs
  • Electronics: Tesla PU w/ V+T controls
  • Finish: PU-lacquer
  • Strings: D´Addario EXP16
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