Sescom IL-19 In-Line Audio Hum Eliminator
[REF]:
https://www.bhphotovideo.com/c/product/738555-REG/Sescom_IL_19_IL_19_Inline_Audio_Hum.html
The IL-19 from Sescom is a compact audio hum eliminator that allows you to remove ground loop hum, mode noise, and differentially induced hum without the need for multiple transformers, ground lifters, or phase inverters. This slim inline module has a high-impact ABS thermoplastic housing and standard XLR connectors at each end to fit easily into your signal path.