The AudioQuest USB-A Noise-Stopper Caps are protective inserts designed to cover unused USB-A ports on audio, video, and computer equipment. By sealing open USB connections, they help reduce the ingress of radio-frequency interference (RFI) and electromagnetic interference (EMI), which can negatively affect system performance in sensitive digital and audio environments.
In addition to improving noise isolation, the caps also provide physical protection for unused ports by blocking dust, moisture, and corrosion. This helps maintain long-term reliability and connection integrity across connected devices.
Compact and easy to use, the Noise-Stopper Caps are a simple accessory intended to support cleaner signal environments and better system hygiene in professional and home setups.
Features
Covers unused USB-A input/output ports
Helps reduce RFI and EMI noise intrusion
Protects ports from dust, debris, and corrosion
Supports improved long-term port reliability
Simple push-fit installation and removal
Compatible with standard USB-A ports
Compact, low-profile protective design
Specifications
Product: AudioQuest USB-A Noise-Stopper Caps
Connector Type: USB-A port cover
Application: Noise reduction and physical port protection
Compatibility: Standard USB-A inputs and outputs
Function: Passive shielding against environmental and electrical interference
Design: Non-conductive protective cap
Included
Set of USB-A Noise-Stopper Caps (quantity varies by package)
