PAC SNI-1/3.5 3.5-mm Ground Loop Noise Isolator Works with iPod/Zune/iRiver and Others

Original

This filter appears to totally fix the annoying static I get when connecting my phone to the Aux port in my Mazda 3 and charging the phone at the same time. Great product and plugs in super simply.

good product

It help to reduce some hum but sometime it also muted some sound

Fantastic product that eliminates those weird humming sounds from ground loop problems. I also did not notice any difference in sound quality when using it (I use it in-between a computer and mixer) even when I swapped it in and out quickly to try and see if I could catch any changes in the sound. I am not an audiophile but it seems to me that there is no degradation in quality at all.I originally wanted to mix the audio of my desktop and laptop to the one set of speakers I have so I wouldn't have to keep swapping cables. I bought a Rolls Mx41b passive mixer for this (my speakers are Logitech Z2300's and have a very powerful amp so passive is fine for me). To my dismay there was a weird buzzing sound if I turned the volume up at all, although it only happened when I had both computers plugged in. I thought it was the mixers fault so I bought an ARTcessories SplitMix4; but the problem was still there! Googled a bit and found this gem, put it in-between the laptop and mixer and viola! Buzzing was completely gone and no difference in sound quality!Just a note that the cover for the box is not very secure and popped off very easily, but it was easy to put back on and didn't seem to affect performance at all so no big deal.

I have a Dodge Durango and installed an aftermarket radio with an auxiliary input on the front face of the unit. I am a car audio fan so I installed a full system with aftermarket speakers, amplifiers and subwoofers. I only mention that because I am very picky about my music and have a real hard time with any kind of noise in the system. I loved plugging in my iPhone or Android device and listening to Pandora or Spotify. However, as we all know, you can only listen so long before you want to plug your phone in for power or to charge. As soon as I attached power to my phone through either a USB plug in the console or through the cigarette lighter connection there would be horrible alternator whine in the system. I love music and this of course drove me completely crazy. I tried everything including buying a mini blue tooth receiver so I wouldn't have to plug my phone directly into the radio. However, the Bluetooth needed power so as soon as I plugged the Bluetooth receiver in for power, the alternator noise was right back. For any of you that have experienced alternator noise in your car radio, it is a horrible whine that increases or decreases in pitch related roughly to the speed you are going. The louder you turn up the radio, the louder the noise. It's bad.I had finally had it and tried to search online for some kind of isolator and found this little gem. It arrived today and literally just plugs in between your phone and your radio. It took seconds to install and bingo, no more alternator whine. The sound is crystal clear, even when I plug my phone into power. At the highest volumes, even with no music playing there is no background whine or even any hiss or white noise that sometimes comes in from other places in the system. The sounds was just perfect.Some people may have some issue with the size, but it tucks neatly next to my seat and you can't even tell it is there. The total length of the cable is a little short if you are plugging it in to the front of the receiver as it may hang down next to the radio. I would recommend either getting a short mini-phono extension cable (good quality) or simply affixing it to the side of the center console with some double sided tape. It is really fairly small and can be hidden out of the way pretty easily.So far it seems to be of very good quality, not fragile and looks like it could stand up to repeated plugging and unplugging as the connectors are very good. However, once you install it, you really never need to take it out. I will be getting one for each vehicle.We will see how it lasts, but for the price, it is a fantastic solution. I highly recommend this to anyone who has any kind of induced noise coming into their auxiliary plug in their radio. You won't be sorry! Good luck and good listening!