MCX Connectors & Adapters Amphenol RF MCX Connectors and Adapters provide options where weight and physical space are limited. The MCX series offers a snap-on connector design and broadband capability from DC to 6GHz. A range of microminiature connectors is available, including a printed circuit board and cable connectors. Applications for Amphenol RF MCX Connectors and Adapters include automotive, wireless LAN, broadband, and wireless infrastructure.