Four Channel Ground Loop Isolator Audio Noise Filter 4 RCA AP3054
- Reduces High Pitched Whine Alternator Noise caused by the car's electrical system.
- Always Use High Quality RCA Cables for your Audio System.
- Dimensions: 3.4 x 1.5 x 1.5, Unit Weight: .30 Lbs. Tips: Ground each amplifier independently. Same thing if you have added stiffening capacitors, go to a separate ground for the cap.