All Pro Audio and Sound technicians have been in the situation where unwanted noise has to be extinguished! The Seismic Audio Hum Noise Filter and Eliminator does just that! This Noise isolation device was designed to eliminate the line level applications that can sometimes be noisy or have interference. The SA-HumDropper also eliminates ground loops that can create these events such as the connection from microphones to mixers or the connection from mixers to amplifiers! This handy device is a must have for Pro Audio and Sound techs as it eliminates and filters out hums interference and buzz to ensure a more pure and uniform sound every time!