The Sound Devices A-FILTER, an accessory PC board, adds RF immunity for microphones, specifically when connected to digital wireless transmitters like the A10-TX.
Sound Devices A-FILTER - Features:
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Requires soldering onto the female end of a straight XLR cable - read instructions here
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For use with balanced microphones
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Connect the XLR containing the A-FILTER directly to the microphone
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Reduces unwanted RF signals by -40 dB
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Not compatible with the original AC-BALXLR cable