Modulus Guitars
Get Modulus Guitars essential facts below. View Videos or join the Modulus Guitars discussion. Add Modulus Guitars to your topic list for future reference or share this resource on social media.
Modulus Guitars
Modulus Guitars
IndustryMusical instruments
FounderGeoff Gould
HeadquartersSan Pablo, California
Area served
ProductsElectric guitar, Bass guitar
WebsiteModulus Guitars

Modulus Graphite (before -- Modulus Guitars) is an American manufacturer of musical instruments best known for building bass guitars with carbon fiber necks. The company, originally called Modulus Graphite, was founded in part by Geoff Gould, a bassist who also worked for an aerospace company in Palo Alto, California.


The name is a reference to Young's modulus, a measure of the stiffness of an elastic material, used in the field of solid mechanics. Carbon fiber has an exceptionally high modulus.

Traditionally, electric guitar and bass necks are made from hardwoods (such as maple or mahogany) reinforced with an adjustable steel "truss rod." Wood, being a naturally occurring material, is prone to variations in density and flexibility. This, coupled with the high stresses created by stretching steel strings across them lengthwise, makes wood necks prone to certain unpredictable and undesirable qualities. Among these are twisting, incorrect "bowing" (either too pronounced or too subtle), and "dead spots," or areas on the neck where notes are quieter or more indistinct compared to other areas. Non-traditional neck materials such as carbon fiber and aluminum are attempts to correct these issues by replacing wood with lighter, stiffer and more uniform components.

Gould was inspired to experiment with non-traditional materials after attending a 1974 Grateful Dead concert, at which he marveled at the size and complexity of Phil Lesh's heavily modified bass (customized by Alembic) and began to consider the possibilities of lighter, stronger materials. After being passed over by his employers in the aerospace industry, the project of creating hollow, carbon fiber bass necks was brought to fruition by Gould and Alembic, who built a bass with a prototype neck and displayed it at a trade show in 1977. Immediately after the trade show, the bass was purchased by Fleetwood Mac bassist John McVie.

Gould and some of his colleagues in the aerospace industry founded Modulus Graphite and began to make necks for Alembic and other companies before moving on to making entire instruments.

As of December 20, 2013 Modulus Guitars LLC was placed into voluntary Chapter 7 arrangements.[1]

Joe Perman, a former Modulus Graphite worker, has continued the work and builds a limited number of instruments monthly. These high end instruments are built to order.


Red Hot Chili Peppers Flea with his Modulus Funk Unlimited
  • SP and SPX (bolt-on and neck-through models)
  • BaSSStar (both bolt-on and neck-through models, some headed and headless necks were also available)
  • TBX (through body experimental); it is rumoured, that only 11 four-string, 85 five-string and 90 6-string basses were made before year 2000 - production has started again
  • Quantum SPi bass (SPi = integrated, bolt-on neck)
  • M-92 (Sweet Spot bass = single EMG pick up, bolt-on neck, pickguard; in production since 1992)
  • Sonic Hammer (like M-92, but bartolini pick-up and electronics, quilt top, no pickguard)
  • Genesis Bass (bolt-on neck with carbon core, wood sides and fretboard)
  • Modulus VJ Bass (Vintage J, bolt-on, active or passive electronics)
  • Funk Unlimited (formerly Sonic Hammer and the Flea Bass, bolt-on neck; also available as chambered & lightweight RevOLite version)
  • Funk Persuasion (single pick up, passive electronics, bolt-on neck; also available as chambered & lightweight RevOLite version)
  • Vertex (single pick-up, bolt-on)


  • Modulus Genesis I Electric Guitar (G1)
  • Modulus Genesis I Electric Guitar with tremolo (G1T)
  • Modulus Genesis II Electric Guitar (G2)
  • Modulus Genesis II Electric Guitar with tremolo (G2T)
  • Modulus Genesis III Electric Guitar (G3T)
  • Modulus Genesis III Electric Guitar Carved Top (G3CT)
  • Modulus Genesis III Electric Guitar Semi Hollow (G3SH)
  • Modulus Genesis III Electric Guitar Full Hollow (G3FH)

Notable players

See also


  1. ^ "Company Bankruptcy Information for Modulus Guitars, LLC". Retrieved 2015.

External links

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



Music Scenes