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