Lewitt LCT 640 Reference-Class Condenser Microphone Superior transient response from ultra-thin externally biased, gold-layered low-mass diaphragms for ear-catching realism and authentic sound Flat frequency response for natural, authentic sound 5 directional characteristics for maximum flexibility in a wide variety of recording applications 10 dB self-noise and max SPL of 145 dB for a total dynamic range of 135 dB, providing maximum acoustic presence and clarity 4-position switchable pre-attenuation pad (0 dB, 6 dB, 12 dB and 18 dB) for handling extremely high sound pressure levels and 4-position high-pass filter