Isolate and eliminate 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 DC impedance of the device is 100 ohms and the audio impedance is 3500 ohms at 1000 Hz. The nominal input power is 50 watts, with a maximum power level of 100 watts. Each of the RCA plugs and jacks is gold-plated to ensure smooth, corrosion-free connections. The unit measures 100 x 50 x 22 mm and both the input and output leads measure 9" in length. Note: The packaging erroneously indicates that the isolator's case is made of metal. It is in fact made of plastic. We are working to correct this discrepancy and apologize for any confusion or inconvenience it may cause.