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Noise-Stopper Caps
AudioQuestEstimated price (community-sourced)
About the Noise-Stopper Caps
AudioQuest RCA Noise-Stopper Caps are precision-engineered caps that fit over unused RCA jacks on audio and video components to prevent radio-frequency interference (RFI) and electromagnetic interference (EMI) from degrading sound quality. The caps feature 23 internal springs for a universal, secure fit on all standard RCA inputs and outputs. They provide protection against dust and corrosion while maintaining a clean, finished appearance on audio equipment. Users report audible improvements including lower noise floors, blacker backgrounds, and more expansive soundstages. The caps are easy to install and remove, requiring no special maintenance. They are suitable for use on high-end stereo systems, AV receivers, DACs, subwoofers, and professional audio setups. AudioQuest also manufactures compatible noise-stopper caps for USB, RJ45, XLR, and HDMI connectors.
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