Effectively isolate ground loop noise, eliminate interference noise caused by phase differences between overlong audio cables and different audio devices, and bring you clean and lossless audio. Dual 1/4inch instrument balanced and unbalanced (1/4Inch) direct box structure is suitable for stage and studio applications. Due to the ultra-flat frequency response brought by the Permalloy transformer. The transformer also eliminates hum and buzz caused by ground loops by isolating the input from the output. Low noise: The ground lift switch eliminates typical ground loop problems. Send the pass signal to your isolator and output to the PA system. Transformer isolation eliminates annoying hum and buzz caused by ground loops. Safe hot-swap: Helps protect the transmission between audio devices, preventing them from being burned out due to voltage differences or static electricity, while preventing popping noise when plugging or unplugging wires. Dual Channel Input and Output: Free input conversion between gold-plated 1/4-inch cables, independent 1/4-inch output port on the back, can be used as two-way isolation. Grounding Setting: With independent left and right grounding switches and universal grounding switch, it can avoid hum interference caused by grounding problems. Wide Application: This professional grounding ring isolator is suitable for almost any electronic equipment you need to eliminate noise. Such as sound systems, subwoofers, karaoke speakers, mixers, guitars, keyboards, etc. Colour:Black Material:Aluminum Alloy Package Contents: 1 * Audio Isolator