Features: Isolate and noise caused by a ground loop in an audio circuit with this Four-Channel Ground Loop Isolator. The isolator ensures that the shield ground on each audio cable is isolated from any equipment ground, which could cause audible noise when amplified. This device has four channels, composed of two pairs of stereo (L+R) inputs and outputs. The nominal for DC impedance of the device is 100 ohms and the audio impedance is 3500 ohms at 1000 Hz. The nominal input power is 50 , with a maximum power level of 100 ., Manufacturer: Akfldms