Review on PAC SNI 135 Ground Loop Isolator by Brian West

We recently decided to buy car charger cables for our iPhones and noticed a buzzing noise when connecting the charger and extra audio cables. Familiar with the concept of ground loops causing noise, I looked for an isolator and found this one. The picture showed that I would need an extra 3.5mm stereo cable for each machine and I was happy to see that I didn't need it as it comes with a jack and a plug, each on short cords, going into the device. It works out. very good at removing the hum from our Prius and Sienna and I've uploaded the correct image from the manufacturer's website in case Revain doesn't fix their stock image. I'm not an audiophile and didn't notice the frequency filtering mentioned by others. And the price is very good!