The Ebtech 2-Channel Hum Eliminator is a quick-and-easy way to eliminate AC hum and noise. Insert the Hum Eliminator in the line-level signal path after your preamp and it will break noisy ground loops without degrading your signal. Use it on long unbalanced lines that are especially vulnerable to noise. Many mixers don't have balanced monitor outs and aux sends, but you can make them quiet using Ebtech's Hum Eliminator. Includes 1/4" TRS smart jacks that convert automatically back and forth between balanced and unbalanced lines. Made in the USA.