Shure PA421B Four-channel Antenna Combiner, 470-865 MHz

Shure 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.)Features Combines up to four PSM® transmitters to a single antenna set Improved intermodulation artifacts for cleaner RF environment Reduces rack clutter Wideband operation (470-865 MHz or 865-960 MHz) Daisy-chain up to 2 combiners with the expansion port LED indications of signal presence, signal overload Improved fan design significantly improves thermal efficiency and ambient noise Optional modification to enable combining of microphone receiver antennas (contact Shure Service Department for more details) Provides +15V bias on RF inputs to power antennas Requires modification of unit by qualified service technician