The Shure’s PA821A Antenna Combiner is designed to optimize RF management for Shure PSM Personal Stereo Monitor systems. PA821A can be used when multiple systems are needed to monitor on stage, theater, and rehearsal applications.

The Shure’s PA821A Antenna combiner can efficiently optimizes up to 8 PSM transmitters which is sold separately when racked in a central location while reducing rack clutter. The combier PA821A is built with LED indicators for signal overload and signal presence. Moreover, the unit's fan design improves thermal efficiency and ambient noise.