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

OUR PART #  PA421B

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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.)

Shure PA421B Features:

  • Combines up to four PSM® transmitters to a singleantenna 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
  • Provides DC power to compatible IEM transmitters
  • LED indications of signal presence, signal overloadand current draw
  • Improved fan design significantly improves thermalefficiency and ambient noise
  • Optional modification to enable combining ofmicrophone receiver antennas (contact Shure Service Department for moredetails)
    • Provides +15V bias on RF inputs to power antennas
    • Requires modification of unit by qualified service technician

Shure PA421B Specifications:

  • RF Frequency Range: 470-865 MHz
  • Impedance: 50 Ohm
  • Operating Temperature Range: -18 °C (0 °F) to 63 °C (145 °F)
  • Power Requirements: 100 to 240 V AC, 50-60 Hz
  • Current Drain: 1.09 A (referenced at 100 V AC) (109 VA)
  • Power Consumption: 98 W max.
  • Included Accessories:
    • IEC Power Cord
    • Four (4) 2 ft. DC power output cables
    • Four (4) 22 in. coaxial cables, BNC terminated
    • One (1) 11 in. coaxial cable, BNC terminated

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

OUR PART #  PA421B

Product Information:

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.)

Shure PA421B Features:

  • Combines up to four PSM® transmitters to a singleantenna 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
  • Provides DC power to compatible IEM transmitters
  • LED indications of signal presence, signal overloadand current draw
  • Improved fan design significantly improves thermalefficiency and ambient noise
  • Optional modification to enable combining ofmicrophone receiver antennas (contact Shure Service Department for moredetails)
    • Provides +15V bias on RF inputs to power antennas
    • Requires modification of unit by qualified service technician

Shure PA421B Specifications:

  • RF Frequency Range: 470-865 MHz
  • Impedance: 50 Ohm
  • Operating Temperature Range: -18 °C (0 °F) to 63 °C (145 °F)
  • Power Requirements: 100 to 240 V AC, 50-60 Hz
  • Current Drain: 1.09 A (referenced at 100 V AC) (109 VA)
  • Power Consumption: 98 W max.
  • Included Accessories:
    • IEC Power Cord
    • Four (4) 2 ft. DC power output cables
    • Four (4) 22 in. coaxial cables, BNC terminated
    • One (1) 11 in. coaxial cable, BNC terminated
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