Shunyata Research

Shunyata Research Hydra Sigma S12 Power Conditioner

The Sigma S12 represents the jewel of Shunyata Research’s Performance Series of power distributors.  Developed using Shunyata Research’s award winning Hydra Triton v3 design platform, Sigma S12 offers world-class performance at a price that belies the science and innovation within its design. From its patented Noise Isolation Chambers to Shunyata’s exclusive solid copper CopperConn outlets, every part and material in the Sigma S12 has been custom designed for performance without compromise.

The Hydra Sigma S12

Sigma S12 is massively over-rated to handle even the most current hungry amps yet true to its passive nature runs cool and quiet in operation. The twelve outlets in the Sigma S12 can accommodate large systems while its 3-stages of noise isolation offers the most stunning aural and visual images in its class. Although packed with 20+ years of Shunyata’s most evolved technologies, Sigma S12 comes in at a price point that makes it one of the best values in the market today.

The S12 has twelve outlets which makes it the ideal solution for large systems or for home theater systems. If you need high capacity but want near reference level performance, the Sigma S12 is your top choice.


The NIC™ (Noise Isolation Chamber) is a patented technology that reduces high frequency power line noise.

NICs™ use a non-reactive ferroelectric substance that actually absorbs high frequency noise. This reduces noise without any of the negatives associated with power filter coils, capacitors and transformers.

GP-NR Noise Reduction

Significant amounts of noise exist on the ground plane of power lines. The ground wires can act as antennae, picking up electrical noise that can degrade the performance or operation of the electronic components. Ground Plane Noise Reduction (GP-NR™) is a proprietary technology developed by Shunyata Research to significantly reduce ground-plane noise; improving low-level resolution and clarity. The system includes one to four terminals, depending on the model, to connect as many as 12 audio components. We offer several models of CGC chassis grounding cables each made to your custom length and termination requirements.


Maximum Voltage:

90-125 VAC r.m.s. unregulated (US)

220-240 VAC r.m.s. unregulated (EU, AS, AU)

Input Current Ratings:

Maximum Continuous Current: 20A (US, AS)

Maximum Continuous Current: 16A (EU, AU)

Output Current Ratings:

Max Current/Outlet: 20A (US, AS)

Max Current/Socket: 16A (EU, AU)

Transient Suppression:

Maximum Transient Protection: 40,000 A @ 8/50 μs

Over-Current Protection:

Hydraulic Electromagnetic Breaker

Wiring System:

8 gauge ArNi® VTX™ Buss System

10 gauge ArNi® VTX™ Wiring

Ratings: 600 V 105° C

Noise Suppression:

Input to Output (100 kHz – 30 MHz): > 50 dB reduction

Zone to Zone (100 kHz – 30 MHz): > 60 dB reduction

Outlets & Connectors:

Zones of Isolation: 6 Zones

Inlet: IEC C19RUS Outlets: 12 NEMA5-20R

AS Outlets: 12 NEMA 5-20R

EU Sockets: 12 CEE 7/3

AU Sockets: 12 AS/NZS 31123

Vibration Control:

Vibration dampening panels (internal)

AC outlet dampening gaskets

Shunyata Isolation SSF-50 Footer


Aluminum and steel chassis

Anodized, aluminum faceplate


Length: 127 mm

Diameter: 38 mm


Width: 17.0 inches (43.2 cm)

Depth: 11.5 inches (29.2 cm)

Height: 6.3 inches (16.0 cm)

Weight: 19.5 lbs (8.85 kg)

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