The Shure PA421B PSM Antenna Combiner cuts through RF chaos to deliver clean, organised monitoring solutions for professional audio environments. This versatile unit streamlines your setup by supporting up to four PSM 900 transmitters or two PSM 1000 transmitters, making it an essential component for centralised rack configurations. Built specifically for PSM Personal Stereo Monitor systems, it reduces antenna clutter while maintaining the quiet, reliable performance that keeps your monitoring system interference-free.
Multi-system environments demand robust solutions, and the PA421B rises to meet those challenges with engineered precision. By minimising the need for additional antennas, this combiner frees up valuable rack space and creates a cleaner, more organised professional setup. Its stable design ensures consistent RF performance across live performances and studio sessions, making it a trusted choice for audio professionals who require dependable monitoring solutions.
Integration with existing Shure PSM systems is seamless, allowing you to optimise your workflow without compromising on performance. The PA421B represents a practical approach to RF management, combining functionality with the reliability that Shure is known for in professional audio applications.
- Combines multiple PSM transmitters to a single antenna set: Improves RF networking ,Reduces rack clutter
- Wideband operation (470–865 MHz or 865–960 MHz)
- 4 Input LED Signals (green when active; off when inactive)
- Quieter fan for significant reductions in ambient unit noise
- Temperature-sensitive fan power for significant reductions in ambient unit heat
- Provides DC power to compatible IEM transmitters
- LED indications of signal presence and signal overload
- Passive (non-powered) antenna combining



