Ebtech Hum X Ground Loop Hum Exterminator The Ebtech Hum X filters out unwanted voltage on the ground line that can cause ground loop hum. Simply place the Hum X on the end of the power cord of the equipment that has a Ground Loop and plug the Hum X into the wall outlet. Ground Loop is gone and audio signal remains intact. Easy to use, easy to install, absolutely safe and completely effective! Ebtech Hum X Features: Gets Rid of GROUND RELATED hum/buzz right at the Source! Suitable for use on 120V 60Hz grounded USA style power outlets. NOT A GROUND LIFT! Max current draw per Hum X = 6 Amp Encased in durable thermoplastic Handy LED shows unit is working. Two-Year no hassle warranty!