Mic adapter for Earthworks M30 with HM or UH400a/TM.
This adapter may be needed if you are experiencing noise or distortion with measurement microphones, particularly the Earthworks M30. The adapter has common mode checks for supressing RF noise. If your microphone signal exhibits the problems listed above when connected to a UH400- or HM-type transmitter, insert the adapter between the microphone and the transmitter.