PACSNI-1/3.5 3.5-mm Ground Loop Noise Isolator Works with iPod/Zune/iRiver and Others , Black

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!

Works like a charm, this silenced the annoying humming a popping noises I got in my Can Am Maverick R.

Klipsch Promedia 2.1 PC speakers had ground loop noise. Had to max out the volume in Windows so I could turn down the volume on the speakers otherwise there was constant horribly distracting buzzing, humming, popping, clicking. This completely fixed it AND the audio quality is unharmed. Stellar product!

Well made, does what it says. I have a 26 year old mazda and when I charge whatever audio device that's aux-ed into my car I hear the buzzing/whirling. When I got this in my PO Box, I immediately plugged it in for the ride home. Lo and behold it worked! I drove all the way home in stop and go traffic and enjoyed my buzz free music. While parked at home, I decided to find out if the volume lost was noticeable to my own ears. My findings were disappointing. The noticeable amount of volume lost was almost the amount of "loudness" the buzzing was at its maximum. I would stay, if you have your iPhone plugged it, it was roughly 1 or 2 volume down button presses; or 10-20% subjectively. That means it will probably not perform loud enough for freeway driving in my car. So I gave it to my girlfriend who has a proper stereo in her car with all the wattage she could ever need but also shares this problem. I did however, order off for another one of these to have for those times I really have to charge my phone.So its worth it; but it does cause a loss in volume and I have to say, I noticed the music was less "full" even when I lowered the volume of the unfiltered test. So there's not only a loss of volume, but richness as well. Oh well, sure beats the heck out of BUUUUUZZZZZ WHIIIIIIIIIRRRRRRR! I'll use it when I must charge my phone, and when I don't; I'll raw dawg my phone on the aux cable.Also, I've included images of the unit itself. Its held together with friction and hot-glue. Not an overly quality made product. It does however use isolation transformerS (two) ... so its not some hippy feel good product or magic black box that you buy and it works because it makes you think it works. It actually has the proper components to eliminate ground loop problems (root cause of the buzzing). So they spent your $10 on making the device perform adequately and just slapped it together with a plastic case and hot glue. They also have nice rubber-like grommets to keep the aux cable from chafing on the hard plastic case, NICE! You paid $10, what more do you want? The transformers alone are worth $10 (or more) at radio shack. And admittedly I had to PRY the case apart...so it was made adequately as well. Not enough to keep out the curious however!

Exactly what I needed. Home PC has some densely packed electronics nearby. Router and/or UPS was inducing a super subtle buzz to the Klipsch ProMedia 2.1 speakers. (I'm admittedly extra sensitive to noise.) Putting this in line between PC's audio-out and speakers' audio-in immediately squashed the buzz with no impact to sound quality.