The A-FILTER is an accessory PC board that reduces RF interference. Requires soldering onto the female end of a straight XLR cable - read instructions here For use with balanced microphones Connect the XLR containing the A-FILTER directly to the microphone Reduces unwanted RF signals by ~40 dB Not compatible with the AC-BALXLR, AC-BALXLR-2, and AC-BALXLR-3
