Overview
Shure PA421B Four-channel Antenna Combiner, 470-865 MHz
PA421B Antenna Combiners are complementary accessories for Shure PSM® Personal Stereo Monitor systems. When multiple systems are required for monitoring applications, the PA421B combiners quietly and efficiently optimize RF management for up to four PSM® transmitter, while also reducing rack clutter. (Directly replaces PA421A.)
The PA421B is compatible with Shure PSM 900 and PSM 1000.
 
Combines up to four PSM transmitters to a single antenna set for improved RF networking & reduced rack clutter.
Wideband operation (470-865 MHz)
4 Input LED signals (green when active; off when inactive)
Quieter, temperature-sensitive fan for significant reductions in ambient unit noise and heat
Daisy-chain up to 2 combiners with the expansion port.
LED indicators for signal presence and signal overload
Passive (non-powered) antenna combining*
* Contact Shure Service Department for more detail and availability. Requires modification of unit by qualified service technician.