Rotosound's Funkmaster 66 bass strings are stainless steel roundwounds engineered for articulate slap playing and dynamic tonality. Developed in partnership with Mark King of Level 42, this UK–manufactured set applies decades of Rotosound's hand–wound heritage to a carefully considered 30–50–70–90 gauge configuration. Built on original machinery using precise tolerances and premium materials, these strings deliver the tonal consistency King relied upon across world–touring performances and studio recording.
The FM6 30–90 gauge set balances responsiveness with tension control, addressing the specific needs of funk and slap technique where clarity under attack matters as much as sustain. Stainless steel construction resists corrosion and extends string life without sacrificing brightness across the frequency spectrum. Hand–finished by skilled engineers, each string undergoes quality control to ensure repeatability from packet to packet, a standard Rotosound has maintained since its original 1960s manufacturing approach.
Mark King's involvement with custom gauges spanning over thirty years underscores the practical value of these strings for players exploring drop tunings or unconventional setups. The 30–90 specification originated as his preferred configuration and remains available with optional double–ball end fitment for specific bass models. For players serious about consistency between live and studio sound, this signature set represents a direct link to proven performance rather than a generic compromise gauge.
Features
- Stainless steel roundwound construction for bright, durable tone.
- Gauge set: 30–50–70–90 for balanced tension and articulation.
- Hand–wound on original Rotosound machinery by skilled engineers.
- Developed with Mark King for funk and slap bass playing.
- UK manufactured to precise tolerances using premium materials.
- Consistent tonal output across multiple packets for touring reliability.
- Available with double–ball end option for compatible bass models.
- Corrosion–resistant stainless steel extends playable lifespan.



