BESIGN Ground Loop Noise Isolator for Car Audio/Home Stereo System with 3.5mm Audio Cable

I'm using a 12v car subwoofer connected to a pc, with a separate 12v power supply powering the sub. A bit of a nightmare to get working properly, but it eventually worked. Except for the INFURIATING humming sound coming from the speaker. I spent two whole days researching what could be causing it, and tearing the whole room apart to try different configurations to see if it would eliminate the noise. If anything, it only got worse. So many sleepless nights thinking about it, and hours of listening ruined by the incessant hum. Eventually came across these "ground loop isolators" and ordered this one. Eagerly awaited its arrival while making do with my soul destroying humming machine. It finally arrives. Now, normally when I switch on the sub, the noise begins blaring immediately, especially when the pc is off. So I set up this little beauty, switch on the sub and.....silence. Deafening silence. I checked the sub, thinking it wasn't after switching on. It had, but not a peep from it!!! Totally eliminated the hum! I immediately started laughing and dancing with joy, I think that's the happiest I've ever been in my life, to hear NOTHING. Buy this little thing, even if you don't have a problem it can solve, because it's just so satisfying holding something that just *works*

This thing worked great! I was getting Ground Loop Noise through my new Rokit speakers from my PC that is connected to the mains. I tried plugging them into the same/different power sources and different cables with no luck. The speakers worked fine through anything that had a battery (phone/Tablet). I connected this between my PC and speakers and all noise that shouldn't be there was gone! For £7 its worth a try.

I used this on the sound bar on my TV it had a Ground loop buzz and was driving me mad so I got this and it works fine no more buzzing so Top marks for this bit of kit 10 out of ten.

Had crackling and noise on my Rokit KRK 5’s. This almost eliminated the problem, theres still a tiny bit of noise but much better.

Very easy to install (literally 3 seconds), and it made a massive difference to the sound quality in a 2011 Mini Countryman.No hiss over the audio. I would highly recommend.

The only thing good about this was the fast same day Amazon delivery. I bought this to try to eliminate an annoying hum from my external TV speakers. I suspected the problem was ground loop related as I am powering the speakers on a separate power socket from the TV. After plugging in I was somewhat surprised to find that the hum was actually louder than before. What a complete waste of money.

Had a constant buzzing after connecting my 4K montior to a set of speakers , purchased this the Saturday night, arrived Sunday , plugged it all up and problem solved. Great value and does the job.

I purchased this noise isolator in an attempt to eliminate a loud humming noise made by a bluetooth audio transmitter that was plugged into a usb charger as well as a projector. It works perfectly with no noticeable degradation in sound quality.