Shure PA421B Antenna Combiner

Shure PA421B Antenna Combiner


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Shure PA421B Antenna Combiner


The Shure PA421B Antenna Combiner   combines up to four PSM transmitters to a single antenna set. It can be used when multiple wireless systems are required for monitoring in sound reinforcement applications.

The PA421B reduces rack clutter, optimizes RF management, and provides DC power to compatible IEM transmitters. LED indicators for signal presence and signal overload provide four input LED signals (green when active, off inactive). Also, a very quiet, temperature-sensitive fan keeps the unit cool.

Combines up to four PSM transmitters to a single antenna set 

  • Improved intermodulation artifacts for cleaner RF environment
  • Reduces rack clutter
Wideband operation
Daisy-chain up to 2 combiners with the expansion port
Provides DC power to compatible IEM transmitters
LED indications of signal presence, signal overload and current draw
Fan design significantly improves cooling and reduces ambient noise
Provides +15V bias on RF inputs to power antennas
UPC: 042406472098

Shure PA421B Specs

Connector Type BNC
Impedance 50 Ohms
Operating Temperature Range 0 to 145°F (-18 to 63°C)
Power Requirements 100 to 240 VAC, 50 to 60 Hz
Current Drain 1.09 A (referenced at 100 VAC) (109 VA)
Power Consumption 98 W maximum
RF Input Specs
Connector Type BNC
Configuration Active
Impedance 50 Ohms
RF Gain 0 dB (±2 dB)
LED Indicator 2.5 dBm minimum detection threshold
>24 dBm overload threshold
Main Outputs
Connector Type BNC
Impedance 50 Ohms
Expansion Features
Connector Type BNC
Impedance 50 Ohms
Insertion Loss <4 dB
DC Power Output
Output Voltage 15 VDC
Output Current 660 mA maximum (per output)
Output Power 9.9 W (per output)
LED Indicator 85 mA (minimum detection threshold)
>660 dBm (overload threshold)
Dimensions Not specified by manufacturer
Weight Not specified by manufacturer
Packaging Info
Package Weight 16.75 lb
Box Dimensions (LxWxH) 27.8 x 17.8 x 3.6″

Additional information


470-865 Mhz, 865-960 Mhz


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