Sigma Series cables showcase technological innovation and design execution that simply does not exist elsewhere — at any price. Sigma Series cables combine meaningful parts innovations with objective measurement and an artisan’s eye for construction quality. Unlike many cost-no-object cable products that have little in the way of discernible science, Sigma Series products incorporate an array of definable technologies that sets the standard for quality and performance in the cable industry.

Sigma interconnects feature Shunyata Research’s exclusive patented-pending TAP Polarizer technology. TAP reduces electromagnetic polarization distortion. ΞTRON® technology, Ohno Continuous Cast Copper and VTX™ (hollow core) conductors with exotic fluorocarbon dielectrics make for a true reference quality interconnect.

‌ΞTRON® is a technology developed by Shunyata Research that prevents dielectric absorption and re-radiation in signal transmission. It requires a special type of conductor that has two signal paths and an electric field compensation circuit that creates a cancellation signal that prevents the insulation from developing a charge. ‌ΞTRON® cables preserve the integrity of the source signal even when using very long runs of cable.
Patent US 8,912,436, Patent Ch ZL201180047344.2.

TAP (Transverse Axial Polarizer) is a device that interacts with the electromagnetic field generated by the signal traveling along the signal cable.