The Beyerdynamic MM 1 Condenser Measurement Microphone is engineered specifically for the precise calibration of acoustic environments. With its omnidirectional polar pattern, it excels in measuring studio spaces, PA systems, and sound-reinforcement setups. When paired with a spectrum analyzer, the MM 1 enables accurate monitoring of both frequency response and sound-pressure levels from speakers. Its frequency-response curve is linear at 90° thanks to diffuse field equalization.