BESIGN Ground Loop Noise Isolator, Ground Loop Buzzing Noise Filter, Ground Loop Buzzing Noise Elimination for Car Audio and Home Stereo System with 3.5mm Audio Cable (5Pack)

My GTi is old - it's model year seems to have been the last one prior to the widespread introduction of usb ports as a standard piece of kit for new cars by VW. It has several buttons for satellite radio and a DVD-based navigation system. Bluetooth audio was moving from a rumor to reality but still a few years from being available as a feature. So no easy wireless audio existed for me in this car - only an aftermarked aux jack that I had been plugging into via Apple's Lightning to 3.5mm adapter. I tried using a Bluetooth dongle, which brought brief joy followed by the realization that it would need frequent charging, which invariably brought on the eerie, disembodied, hissing menace of the Audio Ground Loop. Efffff.BUT - I love my GTi; it's paid off, cheap to insure, and driving it still puts a smile on my face. Two weeks ago I did a bit of research on reliable isolation devices, got overwhelmed by the crushing weight of paid-for, AI-faked, ludicrously off-topic, and real reviews, and decided to just buy the most popular one on the big A.Thing works great. No degradation in quality (to my somewhat practiced ears), nor any decrease in volume. Just plugged my bluetooth receiver dongle into the cigarette lighter outlet/usb charger, connected this thing's built-in 3.5mm male cord to the dongle's output, then ran a short 3,5mm cord from this isolator to the aux jack. Voilà. Now that setup sits, out of eyesight, in the emergency-brake-lever area to the right of the driver. When I start the car, on comes the bluetooth. With this isolator in place, I have seamless, interference-free bluetooth audio from my iphone without ever having to plug the phone in to anything. Wonderful. Writing this review was harder than setting it all up.

This is an excellent product (Ground Loop Noise Isolator) to use if you have any type of device that has unwanted sounds in the audio, such as a hum, or buzz, or stray radio signals. I bought two of these, one to plug into a TV sound bar (which had this horrible hum or buzz that started growing louder each time after I turned the sound bar on, and this device immediately fixed the problem perfectly as soon as I pugged it in to the audio line between the TV and the sound bar.. I plugged the second one that I bought into an audio cord coming out of my desktop computer that goes to computer speakers. These speakers had a hum in them, but they also picked up soft talking that sounded like it was coming from a far away radio station. This immediately got rid of all of that unwanted noise and interference, resulting in the excellent, clean sound quality that I wanted. I highly recommend these. I had tried all kinds of other things in an attempt to get rid of those audio noise problems, with no luck in the past. But this device fixed it quickly, and it was inexpensive, and extremely easy to connect.

I bought a new UGREEN shielded aux cable to use with my Sony WH-1000 XM4 headphones for my Rodecaster Duo, but I noticed a problem - there was this awful static noise. I did some research and found online that something called a "ground loop noise isolator" should fix it, so I picked this one up from Amazon and tried it out.Sure enough - it works! I got this for $8.99 and honestly I'd say it was worth it.In a separate case, I noticed an issue when using my Samsung J Series sound bar in my living room with my Dell Latitude laptop. Sometimes I would hear this awful loud buzzing noise, and I especially noticed it if the aux cable was plugged only into the soundbar and I touched the other (unplugged) end with my hand. This also happened while the laptop was connected to the soundbar at some point. Realizing that I was probably making ground with the connection, I tried to use this product for my laptop and the awful buzzing noise went away.Hopefully this review helps!Extra Information:As for why I wanted to connect this laptop to my living room sound bar, it's because I use it as a server running Rocky Linux and I set up a cron job to play a custom alarm sound every morning at 8:00 AM (cronjob syntax is 0 8 * * *) using cvlc (CLI VLC Media Player) that I created, which counts down from 20, then counts down from 10, and then fades into an extremely loud air raid siren. My reason for doing this is because I sometimes fight with myself to get up in the morning, especially if I stayed up late, so hopefully this will help me get up sooner. I'm going to buy a second one of these so I can have one for my Rodecaster Duo and one for my Samsung J-Series soundbar that's connected to my Dell Latitude 7400 laptop.

Had a mid to high frequency buzz. It wasn't coming from having two devices plugged into different outlets. I know because I fixed that problem too.Found which connection made the buzz, put the device into the 1/8" line it was coming from and it's perfect. No more buzz.I can turn off my gate again! Hurray!Connection was from a firewire preamp (presonus firestudio project) going into an HDMI A/V switcher (ATEM mini).

Using this with my portable amplifier. Line noise was really loud but this device eliminates approximately 80% of it. Shame it doesn’t cancel out 100% of it but since I’m using it to practice electric bass/guitar when I’m on the go eg. pool, park, traveling, it does the job well enough. If you’re going to use this heavily, it’s do not recommend.

I got a MouKey stereo mixer for my desk to mix the output of my desktop and laptop PCs. The noise was HORRENDOUS. However, as soon as I added these onto my two input lines, the noise was *GONE*. I've got a whole music studio setup with large mixing decks and ground isolators for my equipment, so to get a pair of these for what, $10 or so? Well worth it.