The LCT 140 AIR offers two sound characteristics - AIR for a record-ready sound and FLAT for highly authentic recordings. It uses one of the most precise matching processes in the industry and the difference between the two mics of a stereo pair is inaudible. LEWITT has one of the most precise matching processes in the industry. The difference between the two mics of a stereo pair is inaudible. The frequency response and sensitivity of every single microphone is measured. A measurement system controls the polarization voltage of the capsule to adjust the sensitivity, so it is the same for all LCT 140 AIR. Then, an algorithm compares the measured frequency response of each microphone and finds the perfect pairs. To be prepared for all eventualities, the LCT 140 AIR has a low-cut and a PAD. You won't break a sweat with loud sources, nor will you have to deal with low-frequency noise when you don't want to.