Stereo Times Reviews Sigma-X NR Power Cables

In his latest review for The Stereo Times, respected audio writer Don Shaulis explores the impact of Shunyata Research’s SIGMA-X NR power cords—and the results surprised even him.

“Cold out of the box… I knew I had to order two more to complete my system. The improvement was dramatic and immediate.”

Originally planning to test just three cables on his source components, Shaulis quickly expanded the evaluation to his monoblocks after hearing the sonic leap: enhanced presence, deeper dynamics, and a startling sense of realism.

“It was like I had more powerful and upgraded amplifiers.”

“Noise is the culprit… The improvements due to additional noise reduction far exceeded my expectations.”

Backed by cutting-edge technologies like TAPc, KPIP v2, and Gen3 NR, the SIGMA-X NR cables proved transformative—even in a highly refined system with extensive power conditioning and grounding.