ITEM NAME:Stock Car RCA Amplifier Audio Noise Filter Ground Loop Isolator Suppressor Features: 100% Brand New High Quality. Passive in-line device. Eliminate ground loop humming and buzzing noise between an audio source and an amplifier.&;nbsp; When used with car audio, this isolation circuit goes between the head unit and the or EQ. Specifications: Connectors: 2RCA Male, 2RCA Female Current Rating: 20A Rated input: 30W Summit Input: 60W Size(DiaH):Approx.3565 mm Color:As the picture shown Package included:1 Audio Noise Filter Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement..Eliminate ground loop humming and buzzing noise between an audio source and an amplifier. Summit Input: 60W. When used with car audio, this isolation circuit goes between the head unit and the or EQ.