Shunyata Research
Sigma NR v2
Best power delivery for high fidelity audio systems.
The Shunyata Research Sigma v2 NR power cable represents the pinnacle of their Reference Line, designed for the world's finest audio components. It utilizes advanced VTX-Ag conductors, combining ultra-pure silver and OFE copper for exceptional speed and tonal richness. Featuring proprietary NR Noise Reduction technology and CopperCONN™ connectors, this cable significantly reduces noise, delivering unparalleled purity, clarity, and dynamic impact. It's ideal for source equipment and amplifiers, offering a stunningly silent background and revealing every nuance of your music.
$1895.00
Owner Satisfaction
4.5
/ 5
Category Rank
2101
/ 6197
#2101 in Audio & Video Cables
Price vs Category Average
+249%
Above average
Who it's for
- Audiophiles seeking ultimate clarity and blacker backgrounds in their soundstage.
- Discerning enthusiasts prioritizing premium construction and reliable, lasting quality.
- Listeners aiming to unlock their high-fidelity system's full sonic potential.
Who should skip it
- Budget-conscious buyers or those seeking value in their audio upgrades.
- Skeptics or those with less resolving systems who may not perceive significant benefits.
- Owners of mid-range audio systems looking for a universal performance boost.
Performance breakdown
Noise Floor Reduction
Proprietary noise-reduction technology creates an exceptionally silent, pitch-black background for music.
Transient Response
Delivers lightning-fast attack and decay for a remarkably lifelike sonic presentation.
Build Integrity
Heavy-duty construction and premium materials ensure long-term durability and signal purity.
Dynamic Range
Unrestricted current flow allows for effortless shifts between delicate whispers and crescendos.
Connector Precision
High-contact pressure plugs provide a secure, low-resistance connection to your components.
Cable Flexibility
The substantial gauge makes routing through tight spaces a bit of a challenge.
What customers say
Customers consistently praise the Sigma NR v2 for its exceptional build quality and the profound impact it has on audio and video systems. Many users report a significant enhancement in clarity, dynamics, and overall system resolution, describing a more refined and immersive listening experience. The product's reliability and premium construction are frequently highlighted, reinforcing its status as a top tier component. While acknowledging the substantial investment, enthusiasts often conclude that the sonic improvements deliver considerable satisfaction, making it a worthwhile upgrade for discerning audiophiles seeking peak performance from their high fidelity setups.
Know before you buy
The Sigma NR v2 is designed to deliver high-current power to demanding components like power amplifiers and integrated amps while simultaneously filtering out high-frequency noise from the AC line.
The 'NR' stands for Noise Reduction. Unlike standard cables that simply conduct electricity, this cable incorporates Shunyata’s proprietary internal filtering technology to suppress common-mode and differential-mode noise without restricting current flow.
In high-resolution systems, you can expect a lower noise floor, which typically manifests as improved micro-detail, a more expansive soundstage, and a cleaner, more authoritative bass response.
Despite its sophisticated internal construction, the Sigma NR v2 is engineered to be reasonably flexible. However, it is a substantial cable, so you should ensure you have enough clearance behind your components to allow for a gentle bend radius.
While it can be used anywhere, the Sigma NR v2 is specifically optimized for high-current applications like power amplifiers. If you have a limited budget, prioritize your amplifier first to see the greatest impact on dynamic performance.
Yes, like most high-end power cables, the Sigma NR v2 requires approximately 100 hours of use to fully settle. You will likely notice the sound becoming more fluid and refined as the internal materials stabilize.
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$1895