Original Pioneer Auto-Equaliser Microphone

Pioneer CD-MC20-Auto-EQ Microphone for Car DVD Receivers
The Pioneer CD-MC20 is an Auto-EQ microphone designed to optimize sound in a car's audio system. It works with compatible Pioneer receivers to measure the car's interior acoustics and automatically adjust the equalizer settings. This ensures the best possible sound for the listener by compensating for the unique characteristics of the vehicle's cabin.