Drawing on more than 25 years of electrical system design for medical, professional recording, and high-end audio applications, Shunyata Research has developed a precise, repeatable approach to system grounding.
A fundamental first step is the use of the CGS ground terminals found on Shunyata power distributors, which provide a centralized and effective connection point for external chassis grounding. Internally, select Shunyata power distributors incorporate GPNR (Ground Plane Noise Reduction) technology, which significantly lowers noise on the system ground plane, particularly when components are connected via Shunyata grounding cables. For systems seeking the highest level of grounding performance, dedicated solutions such as Altaira CG and Altaira-X extend these principles further through individually filtered ground terminals.
This page provides a brief explanation of grounding fundamentals along with step-by-step guidance for proper implementation.
COMMON CONFIGURATIONS
The most basic grounding configuration is to make chassis ground connections from system components directly to the power distributor. Most Shunyata power distributors feature one or more pure copper CGS (Chassis Grounding System) terminals. These CGS terminals serve as the optimal centralized connection point for external chassis grounding. By connecting components using the methods outlined below, a unified ground plane is established, reducing ground-plane voltage differentials between connected components.
Higher levels of performance can be achieved by integrating an Altaira ground plane noise reduction hub. In this configuration, component chassis connections are made directly to the Altaira hub, which is then linked via its green grounding terminal back to the power distributor’s CGS terminal.
Grounding to Power Distributor
Integrating a Grounding Hub
CONNECT A COMPONENT
Use a ground cable to connect your component (we suggest prioritizing the preamp). Select a connection point on the component in the following order of preference:
1. Dedicated Grounding Post
2. Chassis Screw
Only test and loosen screws around the outer edge of the chassis. Do not remove any screws that may secure internal parts. When in doubt, consult the component’s service manual.
3. Unused Signal Connector Ground
Shunyata Ground Tail Adapters are specially constructed so that ONLY the grounds are interconnected. NO signals or signal wires are connected together. Under no circumstances should customers use any standard analog or digital interconnect cables to ground components.
When connecting to analog inputs or outputs, ground both the left and right channels.
If no dedicated grounding post is available, use an analog multi-meter to test for continuity (less than 5 ohms, the lower the better) on a chassis screw or unused signal connection point. This process is explained in greater detail in the Continuity to Ground section.
TEST AND COMPARE
After connecting the first component, take a few minutes to listen and allow the ground cable to begin settling in. Then, remove the connected ground cable and listen again. Reconnect the cable and listen once more. A clear improvement with the cable connected confirms a solid grounding path and provides a reliable baseline as you proceed to connect additional components.
CONNECT MORE COMPONENTS
Continue connecting components using the same methods. After each new connection, pause to listen and compare before moving on to the next. As you begin to enjoy the enhanced resolution and clarity now present in your system, remember that performance will continue to improve over the first 100 to 150 hours as the ground hub and ground cables fully settle in.
CONTINUITY TO GROUND
Some components include dedicated ground lugs, making connections straightforward. However, many do not — requiring alternative grounding methods. One option is to use a chassis screw as the ground point. If the component has no lug and has no obvious way to utilize a chassis screw, you may access a component’s ground through an unused signal connector. Shunyata Research Ground Tail and Multi-Head Adaptors make it easy to connect to any unused RCA, S/PDIF, XLR, AES/EBU, USB, BNC or Ethernet jack.
Continuity tests with a basic analog ohm meter is all you need to know whether these points provide an effective ground connection. Any impedance measurement below 5 ohms indicates a valid grounding connection point.
Test Procedure: Chassis Ground Continuity
1. Place one ohm meter lead on the AC inlet ground pin (middle pin).
2. Place the other lead on a metal chassis screw.
Result: If the ohm meter reads less than 5 ohms, that means that the chassis is connected to the earth-ground and that the chassis screw can be used as a connection point to ground the component.
Test Procedure: Signal Connector Ground Continuity
1. Place one ohm meter lead on the AC inlet ground pin (middle pin).
2. Place the other lead on the barrel of an RCA connector or in the ground pin of an XLR connector.
Result: If the ohm meter reads less than 5 ohms, that means that the signal terminal is connected to the earth-ground and that it can be used as a connection point to the ground component.
CONNECTION PRIORITIES
While nearly all components benefit from grounding, the preamplifier should be considered the highest priority. As the central control unit in most systems, the preamp handles all signal path connections, making it especially susceptible to noise and interference. Grounding the preamp first typically yields the most immediate and dramatic improvement in clarity, dynamics, and lowlevel resolution. By reducing ground-plane noise at this crucial stage, overall system performance is elevated, and subsequent component connections can build upon a cleaner foundation. Connecting additional components can significantly extend the performance gains delivered by Shunyata grounding hubs. Amplifiers, DACs, streamers, transports, clocks, and network hardware all benefit from reduced ground-plane noise when properly connected. While many components lack a dedicated grounding terminal, analog and digital signal port connections can be made easily using our Ground Tail Adaptors.
SELECTING GROUND CABLES
On the surface, ground cables appear to be straightforward in design, but their construction methods, metallurgy, material quality, and applied technologies play a critical role in making the Altaira ground system superior to others on the market. Shunyata Research ground cables feature premium STIS v3™ interchangeable terminations, heavy-gauge VTX™ or VTX-Ag™ conductors, and KPIP v2™ conditioning to create ultra-low-resistance pathways to ground. The lower the resistance of the ground cable design, the higher the percentage of chassis-borne noise that is filtered out. Shunyata offers five tiers of ground cables, each delivering progressively lower resistance and higher performance. At the top, Sigma-X, Omega-X and 'X' include TAPc and CMode modules — proprietary filters that strip away EMI/RFI, revealing hidden layers of low- level detail and spatial information. The best ground cables function like wide-open arteries for noise dissipation, eliminating resistance between components and Shunyata's noise-reducing Altaira ground hubs.
When selecting ground cables, prioritize using the highest-quality cable between the Altaira's green earth terminal and the power distributor (or AC wall adaptor).
GROUNDING FAQ
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