When the problem is resolved, be certain to carefully readjust the transmitter gain control and the receiver output level control to their original settings. Quick Tips - Setting Up Wireless Systems for the recommended procedure. Try a spare microphone or a working microphone from another Audio-Technica wireless system. If no spare microphone is available, try carefully and gently flexing the microphone cable where it enters the microphone capsule and at the connector. If the audio cuts in and out, or is noisy when the cable is flexed, the microphone cable probably is bad.
Bad batteries are a common cause of wireless problems.
Always make certain to have fresh, new alkaline batteries on hand, and always check the transmitter battery first if there are problems with a system. If the receiver audio is noisy, the problem might be interference. See Quick Tips - Avoiding Interference and Resolving Interference Problems for additional suggestions. If the problem is poor range, it could still be an interference problem. For other suggestions on improving range, see Quick Tips - Maximizing Range and Maximizing Range .