The Shure PA421B is a professional active antenna combiner designed to streamline RF management for in-ear monitoring transmitters. It combines the outputs of up to four compatible Shure PSM transmitters into a single, efficient RF feed, improving signal quality while reducing antenna clutter on stage. Active circuitry helps maintain strong, consistent output levels, supporting cleaner, more reliable RF performance in demanding live environments. The PA421B also integrates DC power distribution to supply multiple transmitters from one mains-connected unit, simplifying rack wiring and reducing PSU sprawl. Engineered for touring, rental and installed applications, it offers rugged build quality, BNC connectivity and tidy rack integration with front-mount antenna options. Whether you are consolidating a busy monitor rack or optimising for minimal interference, the PA421B enhances system stability and setup efficiency. Ideal for production companies, theatres and houses of worship seeking dependable RF infrastructure for IEM systems.
Includes
- Connection cable
STAGE22.1.100.429