A-FILTER-R Installation

The A-FILTER-R for Balanced Microphones improves RF immunity for microphones, specifically when connected to digital wireless transmitters like the A10-TX.

The instructions below describe how to mount the A-FILTER-R for Balanced Microphones into a female right angle XLR connector.

Before starting assembly, please make note of the following:

  • The A-FILTER-R should be placed as close to the microphone as possible. The benefit of the RF filter is significantly reduced if placed downstream of the microphone connector.
  • For use with Cable Techniques CT-LPXLR-3F female right angle XLR connector only.
  • The A-FILTER-R does not degrade the audio signal, affect phantom voltage, or draw any power in any way.

Supplies Required

  • The A-FILTER-R, available from both Sound Devices and Audio Limited.
  • The circuit board was designed to be used with the Cable Techniques CT-LPXLR-3F connector only.
  • Solder, soldering iron, and allen wrench for cable assembly.

Note: Installing the A-FILTER-R assumes knowledge of proper cable soldering and termination.

Step 1

Disconnect the right angle XLR female connector and cleanly desolder the existing cable from the insert. If this is a new cable assembly, this step is not necessary.

Step 2

Take note of the polarity labeled on the circuit board.

Step 3

Connect the individual conductors of the cable to the appropriate +, – and GND terminals on the circuit board.

Solder the A-FILTER-R circuit board to the connector insert. Make certain to align the connector pins with the labeled solder pads on the board.

Step 4

Place the connector in the housing.

Step 5

Reattach end cap. Replace allen screws and turn to secure. Installation is now complete.

Step 6

Test the cable for continuity and correct polarity.

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