Shure PA821B 8-Port PSM Antenna Combiner, 470-865 MHz

Optimize multi-system wireless monitoring with the Shure PA821B 8-port PSM antenna combiner. Designed for professional AV, broadcast, security and surveillance installations, this RF combiner consolidates the outputs of up to eight PSM transmitters into a single antenna feed, dramatically reducing rack complexity and improving RF network performance. With wideband operation across 470–865 MHz, the PA821B supports flexible frequency planning and regional deployments while actively minimizing intermodulation distortion and multipath dropouts for more reliable monitoring. Operational convenience is built in: a quieter, temperature-sensitive fan reduces ambient noise in studios and live environments, and front-panel LEDs provide instant per-input signal and overload status to speed troubleshooting. Rack-mountable and engineered for centralized RF management, the PA821B helps venues, production houses, and security integrators maintain consistent wireless performance for talent monitoring, courtroom or campus surveillance, and critical communications. Streamline your wireless infrastructure with a proven Shure RF solution—add the PA821B to your rack to centralize PSM transmitters and protect signal integrity.

• Combine up to eight PSM transmitters to a single antenna for simplified RF management and reduced rack clutter
• Wideband 470–865 MHz coverage for flexible deployment across UHF bands and regional frequency plans
• Active combining reduces intermodulation distortion and dropouts to improve wireless monitoring reliability
• Quiet, temperature-sensitive fan lowers ambient noise and heat for cleaner installs in live and installed systems
• Front-panel LEDs show per-input signal presence and overload for fast troubleshooting during events or surveillance setups