Review on 🔇 Compact Ground Loop Isolator - 3.5mm / 1/8'' Female Stereo Audio Input/Output, Compatible Model, Engine Noise Eliminator, Portable Design, Ideal for Same Audio Players - Pyle PLGI35T+SEO by Tim Airy

This thing is not only absolutely massive, but also a good ground loop isolator. The size of this device is out of control. The PCB layout is very sparse and it doesn't look like they did this to reduce crosstalk between the transformers as they are side by side and there is a lot of empty space on the PCB near the ends. But it works well, the sound quality is good and the build shows it's solid enough to keep intact. To avoid it getting too big I installed it in the dashboard so I don't have to look at it.