The KSM137 cardioid instrument microphone pair delivers excellent sound isolation and superior transient response. It features a gold-layered Mylar diaphragm, preamplifier for transparency, subsonic filter to stop low frequency rumble, and a pad for handling SPLs. Features: Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs) 3-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs) 3-position switchable low-frequency filter reduces background noise and counteracts proximity effect Common Application: Acoustic instruments -- such as piano, guitar, drums, percussion, strings Wind instruments -- brass and woodwind Low frequency instruments -- such as double bass, electric bass, kick drum Overhead miking -- drums or percussion Ensembles -- choral or orchestral Room ambiance pick-up -- guitar amplifier or drums Versatile, durable, and precise, the KSM137 is an outstanding microphone for instruments ranging from percussion to wind, strings to brass, and piano to guitar.