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Stillpoints Ers

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The ERS ( EMI- RFI Suppression) material redirects, absorbs, and diffuses EMI/RFI frequencies. The benefits of ERS for audio/video are best heard with digital circuits due to the RFI creating aspect of the circuitry itself. Benefits of ERS can also be heard with AC power lines, signal cables, loudspeakers and electronics of all types. EMI/RFI materials have been around for a long time. Most of them are heavy and hard to apply. Many need to be grounded to be effective. None of them are as light weight or easy to deploy as ERS, where grounding is not necessary.


The core of ERS is made of a blend of carbon fibres of various lengths and sizes. Using a proprietary method, these fibres are coated with metals, such as nickel. The exterior is laminated with a polyester textile on both sides to make the material easier to handle and use. ERS may be purchased with a Pressure Sensitive Adhesive (PSA) already applied for easy and quick installation. THis PSA is repositionable within a few hours and then becomes permanent. However, saturation of the material with GOOGONE will allow for easy scraping and removal. The edges of ERS does have exposed conductive fibres and should be handled and installed with care. The electrical resistance of ERS is .026 ohms per square yard. The polyester fabric will insulate the core of ERS, to some degree, but can easily be penetrated with sharp edges. Caution should be exercised when used in close proximity to circuitry. ERS is treated to accept many laminating resins such as epoxy and polyester resins. Available in several sizes of rolled materials. Widths range from 1/4" to 35.5", at any length, on 3" cores with or without pressure-sensitive adhesive. Stock length is 50 linear yard rolls at 1/4", 1/2", 1", 2", 4", 6", and 11" widths.


A simple demonstration of the potential effectiveness of ERS is to lay it near any digital circuitry. For example, place ERS on top or underneath or at the sides of a CD player, DAC or Digital Amplifier. Wrapping AC cables or placing ERS near any AC power strips will also quickly show it's potential. However, its effectiveness will be maximized when placed internally near either EMI/RFI generating or EMI/RFI susceptible circuitry within the enclosure. The enclosure itself traps on board generated EMI and RFI which ERS absorbs, deflects and diffuses. ERS does not operate under the same principles as a shield thus it does not require grounding. The amount of ERS used is component dependent and must be experimented with. We have noticed that 100% coverage is not necessary. Fine tuning may result in very little material required. Our general recommendation is to use just enough ERS to achieve the desired results. Please note... In some analog circuits, the presence of EMI/RFI was tuned into the frequency response of the device. Therefore, a minimal amount of ERS is recommended.


ERS shielding effectiveness (in db attenuation):
10 Mhz - 49
100 Mhz - 48
200 Mhz - 62
400 Mhz - 53
800 Mhz - 54
900 Mhz - 50
1 Ghz - 49
2.4 Ghz - 53 (802.11B)
3.5 Ghz - 54
5.8 Ghz - 57 (902.11A)
7.5 Ghz - 61
10 Ghz - 66
17 Ghz - 55