Review on 🔇 Golvery Ground Loop Noise Isolator: Eliminate Audio Humming, Hissing & Buzzing Noise from Car Audio, Home, PC Stereo System!" by Austin Wolf

This transformer is not even remotely neutral sonically - strange frequency response and different ways in the left and right channels. I experienced a complete loss of bass and mids (<400Hz) in the left channel and an increase in AM radio mids in the right channel. It even made an odd buzz when I rotated the plugs the wrong way. Due to the size of a sample I cannot say for sure if this is a bad product or just poor quality control. Anyway, for me it was a waste of money.