Absolute PNF300 Noise Filter for Car Audio Soun...

Absolute PNF300 Power Noise Filter/Ground Loop Isolator With Adjustable Controls Ground loop isol...

Absolute PNF300 Power Noise Filter/Ground Loop Isolator With Adjustable Controls Ground loop isolators consist of an input, an output, and a transformer. The audio signal enters the isolator through the input jack, passes through the transformer, and exits through the output plug. General Features: Adjustable Ground loop Isolator Reduces High Pitched Whine Alternator Noise caused by the car's electrical system Ground Loop Isolator Noise Filter Signal noise elimination Cylindrical metal case ...