Shure PA421B — Four-to-One Wideband PSM Antenna Combiner
PA421B Overview
The Shure PA421B is a professional antenna combiner engineered specifically for PSM in-ear monitor wireless systems. It consolidates antenna infrastructure by combining up to four transmitter antenna feeds into a single antenna pair, reducing cable runs and simplifying rack layouts in complex multi-channel deployments. Compatible with all P3T, P9T, and P10T transmitters and covering the 470–865 MHz wideband frequency range, the PA421B is suited for touring productions, houses of worship, broadcast facilities, and installed venue systems running multiple PSM channels simultaneously.
By centralizing antenna distribution, the PA421B supports cleaner signal paths and more organized rack configurations, making it a practical solution for system integrators and audio engineers managing high-density wireless environments.
Key Features
- Four-to-One Antenna Combining — Combines antenna feeds from up to four PSM transmitters into a single shared antenna pair, reducing infrastructure complexity
- Wideband Frequency Coverage — Operates across the 470–865 MHz range, providing broad compatibility across multiple PSM frequency bands
- Universal PSM Transmitter Compatibility — Designed for use with all Shure P3T, P9T, and P10T transmitters
- Simplified Antenna Infrastructure — Minimizes the number of antennas required in multi-channel PSM deployments, reducing rack space and cable management demands
- Professional Rack Integration — Built for permanent installation and touring rack systems where clean, reliable RF distribution is critical
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