The Industry Standard - Designed as 3 products in-one, the Sescom Audio Hum Eliminator IL-19 s the industry standard for instantly troubleshooting audio hum and noise problems in live sound & broadcast applications providing quick fix line isolation to stop noise at the source. Removes ground loop hum, mode noise & differentially induced hum without the need for multiple transformers, ground lifters or phase inverters. Other in-line problem solvers solve only one problem at a time. The Sescom Audio Hum Eliminator IL-19 is the only Bi-Directional device designed to plug directly into your equipments inputs OR outputs!