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In-line 12-volt power supply for use with active antennas in wireless systems

Item # 183UABST

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Item # 183UABST

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About the Shure UABIAST

Bob Bihlmayer

Pass the signal along

Shure's UABIAST in-line power supply supplies 12-volt DC output to a wireless system's active antennas when the receiver can't supply sufficient power. Its included PS24 120-volt AC adapter supplies 12-volt DC current to power the UABIAST. The power supply's coaxial cable input and output jacks connect it to the receiver and antenna. This power converter is compatible with Shure QLXD, ULXS4, SLXD, and BLX4R wireless systems, and can also be used to power their UA834 and UA874 in-line amplifiers (sold separately). When the operating conditions push the limits of your receiver's antennas, the UABIAST in-line power supply has your back.

Product highlights:

  • in-line power supply
  • powers an active antenna when the receiver can't supply sufficient power
  • connector type: BNC coaxial cable, female
  • maximum input power: 12.4V DC, 400 mA, +3 dB/+10 dB
  • bias voltage: 12V DC
  • operating temperature range: 45-100°F
  • dimensions: 0.985"H x 2.64"W x 1.93"D
  • weight: 1.73 oz.
  • warranty: 2 years

What's in the box:

  • In-line 12V power adapter
  • PS24 AC Power adapter with attached 6' AC and 6' DC cables (12VDC/400mA output)
  • 21" BNC Cable
  • Instruction manual
  • Warranty information
  • Safety precautions
  • Power supply specifications and safety information
  • Compliance requirements

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More details on the Shure UABIAST

Russ B.

Product Research


Overview: The Shure UABIAST In-Line Power Supply is an in-line power adapter that can provide 12VDC bias power to a Shure active antenna or in-line accessory when a wireless microphone receiver's antenna jack cannot provide the necessary power. The UABIAST is attached in-line with the antenna or accessory cable and connected to the included AC power supply, passing the RF signal through it while injecting 12VDC/400mA bias power for an active antenna or other in-line device. The UABIAST is capable of supplying power to up to three Shure UA834 in-line amplifiers, or two in-line amplifiers and one Shure UA874 active antenna (amplifiers and antennas sold separately).

Power Supply: The Shure UABIAST can provide up to 400mA of current @ 12VDC.

Current Draw:

Shure Device Current Draw
UA830 In-Line Antenna Amplifier 125mA @ 12VDC
UA834 In-Line Amplifier 60mA @ 12VDC
UA870 Directional Antenna with RF Amplifier 79mA @ 12VDC
UA874 Directional Antenna with RF Amplifier 60mA @ 12VDC


  • Antenna Connections: BNC
  • Frequency Range: 100-2000 MHz
  • Maximum Output Power: 400mA @ 12VDC
  • Insertion Loss: <1 dB
  • Impedance: 50Ω
  • Weight: 1.73 oz.

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