Audio & Control Connectors and Accessories Extron offers a broad assortment of connectors for terminating and finishing bulk cable. Using these accessories with Extron bulk cable provides high quality connections and in-field adaptability for handling a wide variety of signal types. 3.5 mm Mini Stereo-HQ 3.5 mm Male Stereo Audio Connector RCA-HQ RCA Male Connector Captive Screw Connectors Replacement captive screw connectors for Extron products