PYLE-PRO PHE400 Hum/Noise Eliminator 2-Channel Box with TRS Phone and XLR Inputs/Outputs Breaks Ground Loops Safely - Maintains Highest Sonic Quality - 60 Hz Noise Removal - Removes AC Hum Noise 1/4-Inch TRS Phone & XLR Inputs/Outputs on 2-Channels - High-Performance Ultra-Compact Design - Passive Device: No Power Required Audiophile High-Quality Components and Exceptionally Rugged Construction Automatically Converts Unbalanced to Balanced Signal Without Any Signal Loss Uses 11:1 Isolation Transformers to Break Loop Antenna and Balance Audio Lines