Review on 🔊 PAC 3.5 Aux Noise Filter: Enhancing Audio Source to Radio Connection by Paul Andrews

TL;DR - Kills noise, happy with my purchase. I created my own AUX input in my car by connecting to XM's "Radio ID" channel. Now I can tune into the factory radio's XM radio ID channel and pull up music from the audio device of my choice and there's no engine noise. My first attempt at doing this was successful, even though I grounded the connection to the car's chassis. Here I could still roar the engine, and it became unbearable when I connected the power to the audio player. This noise filter completely eliminates noise, regardless of whether the device is switched on via the cigarette lighter or not.