Review on 🚗 12V Car EMI Noise Ground Loop Isolator Power Filter for Auto Stereo Audio Radios Amplifiers Speakers Equalizers Subwoofers by Doug Virden

I have very few negative reviews compared to the amount of positive ones. However, the thing doesn't work. I didn't get any noise reduction upon installation. I can see where some have had decent results. That may mean I just got a bad block. The build quality isn't that great when I looked inside. Wire gauge is also deceptive. It looks like an 8 gauge in the photo, but it's actually closer to a 14 gauge. Current carrying capacity is limited. I would choose something else or order parts and make my own. Right now I'm in the process of either finding the best device or brewing at home.