Shunyata Research Sigma-X Speaker Cable | Reference Speaker Cable
Shunyata Research Sigma-X Speaker Cable is a reference loudspeaker cable built around 6-gauge VTX-Ag conductors, fluorocarbon dielectric materials, dual TAPc modules, dual HARP 20 modules, and four days of KPIP v2 processing. Termination options include gold/copper fixed terminals or Shunyata STIS v3 interchangeable terminals.
Choose the standard Sigma-X Speaker Cable for conventional single-wire amplifier-to-speaker connections. Bi-Wire and Tri-Wire versions are available for loudspeakers with the corresponding terminal configuration.
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Choose options
Who is Sigma-X Speaker Cable best suited for?
Reference systems using conventional single-wire loudspeaker connections where amplifier control, low-level resolution, and timing are priorities.
Sigma-X Speaker vs. Bi-Wire and Tri-Wire
Use the standard version for a conventional two-terminal connection. Choose Bi-Wire or Tri-Wire only when the loudspeaker's terminal layout requires those configurations.
Technology
Sigma-X Speaker Cable combines Shunyata technologies for conductor geometry, electromagnetic control, audio-frequency current resonance control, dielectric performance, termination flexibility, and conductor conditioning. The current Sigma-X speaker platform uses 6-gauge VTX-Ag conductors, dual TAPc modules, dual HARP 20 modules, fluorocarbon dielectric materials, and KPIP v2 processing.
TAPc
Patent-pending Transverse Axial Polarizer technology couples to electromagnetic fields surrounding conductors and is designed to reduce electromagnetic distortion. Sigma-X Speaker uses dual TAPc modules with 100 elements.
HARP
HARP addresses current drift and audio-frequency current resonances that can occur in speaker cables. Sigma-X Speaker uses dual HARP 20 modules.
VTX-Ag
VTX-Ag conductors combine a pure-silver center core with an outer concentric ring of pure copper. Sigma-X Speaker uses this geometry in a 6-gauge configuration.
Fluorocarbon
Fluorocarbon dielectrics offer very low dielectric absorption, high dielectric strength, and strong heat resistance.
KPIP v2
Shunyata Research's proprietary Kinetic Phase Inversion Process is applied to conductor and terminal metals. Sigma-X Speaker receives four days of KPIP v2 processing.
STIS v3
STIS v3 is Shunyata's interchangeable terminal system using solid-copper terminals. Sigma-X Speaker is available with STIS v3 or fixed gold/copper terminal options, depending on configuration.
Specifications
Conductors: VTX-Ag
Gauge: 06
Dielectric: Fluorocarbon
Terminals: Gold/copper fixed or STIS v3
TAPc: Dual module / 100 elements
HARP: Dual 20
Standard length: 2.50 m
Color: Black flex
KPIP v2: 4 days
HiPOT: 1,200 VAC
Choice Audio guidance
Match the termination style to both the amplifier and loudspeaker before ordering. If your speaker has multiple binding-post sections, we can help determine whether standard cable plus jumpers, Bi-Wire, or Tri-Wire is the correct configuration.
Frequently asked questions
Does Sigma-X use silver conductors?
VTX-Ag combines a pure-silver center conductor with an outer concentric pure-copper conductor.
What is the standard length?
Shunyata specifies 2.50 meters as the standard length.
Can I change terminations?
Sigma-X is available with gold/copper fixed terminals or STIS v3 interchangeable terminals, depending on configuration.