RCA Audio Noise Filter Suppressor Ground Loop Isolator for Car AMP Home Stereo Product Specification: Color: Black Size: 35X65MM Connectors: 2X RCA Male, 2X RCA Female Current Rate: 15A Package Include: 1X Noise Filter Product Description: It can eliminate the engine noise of stereos and amps, the alternator noise, the noise of ground loop and the car engine noise. Keep a clear listening environment for you. Easy to install, just install two male plugs to the main output of head unit, connect two female plugs to the amplifier or audio. It is suitable to install behind your car accessory socket with small size. Save lots of space for the panel and keep the electronics wires tidy. Ideal for car audio, amplifier, amplifier stereo receivers, car horn, car subwoofer and so on. Eliminate ground loop humming and buzzing noise between an audio source and an amplifier.  When used with car audio, this isolation circuit goes between the head unit and the amp or EQ.