Shure KSM44A/SL Multi-Pattern Large Dual-Diaphragm Side-Address Condenser Studio Microphone Prethos Advanced Preamplifier Technology: Class A, discrete, transformerless preamplifier provides transparency, extremely fast transient response and no crossover distortion. Minimizes harmonic and intermodulation distortions. Groundbreaking specifications: 4dB of self-noise and max SPL of 131 dB for a total dynamic range of 127 dB  an increase of 7 dB that defines the new standard for cleanly nuanced audio capture Multiple polar patternscardioid, omnidirectional and bidirectionalfor maximum flexibility in a wide variety of recording applications Dual 1 inch, externally biased, ultra-thin, 2.5 m, 24 Karat gold-layered, low mass diaphragms provide superior frequency response Premium electronic components and gold-plated internal and external connectors Subsonic filter eliminates rumble from mechanical vibration below 17 Hz. Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs) 3-position switchable low-frequency filter helps reduce unwanted stand vibration noise or counteract proximity effect Integrated three-stage pop protection grille reduces plosives and other breath noise KSM microphones are exquisitely engineered to capture the detailed sonic nuance of critical studio performances, And it withstands the rigors of the most demanding stage environments. Includes ShureLock Suspension Shock Mount, ShureLock Stand Mount, Carrying Case, and Velveteen Pouch. The case is made from aluminum with a custom-cut foam interior. It is carried by a handle on the top of the case. KSM microphones are exquisitely engineered to capture the detailed sonic nuance of critical studio performances, Shure's Prethos(TM) Advanced Preamplifier Technology provides 4dB of self-noise and An increase of 7 dB that defines the new standard for cleanly nuanced audio capture Max SPL of 131 dB for a total dynamic range of 127 dB - Max SPL of 131 dB for a total dynamic range of 127 dB - an increase of 7 dB that defines the new standard for cleanly nuanced audio capture