Shure PA421B Antenna Combiner 100008313 on-ear design provides excellent sound

on-ear design provides excellent sound isolation and a great fit

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Shure PA421B Antenna Combiner 100008313 on-ear design provides excellent soundShure PA421B Antenna Combiner for PSM Wireless Systems 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