Friencity Ground Loop Filter Noise Isolator with 3.5mm (1/8”) Audio Cable for Car Audio/Home Stereo System, Eliminate Humming and Buzzing Noises Completely

This is brilliant. I have had a high pitched whine coming from my PC speakers whenever I insert two sound sources. All was well with the connection from the PC to the speakers but when I plugged in the sound from my fire TV into the same speakers from my monitor, the whine was unbearable. I took a gamble on this and wow, completely silent, no noise but the sound from the source. Excellent product.

I use this to eliminate ground loop noise in my car. Works great. Great value, great product. Performs as expected.

Complete junk, rather than remove a slight hum it introduced a loud buzz, useless!

I don't quite understand how this works, but it does. I was getting horrendous noise when plugging my Mac into a small mixer. poppe in this plug and crystal clear sound, simple as that. I appreciate that noise can come from many sources and problems, but for me, this worked instantly, so I'm thrilled by it.

It stopped working after a month but the seller replaced with the new item

I used this in my 2008 Mazda 3. The aux port had a constant high-pitched whine that increased as I pressed the accelerator. Using this device immediately removed the noise entirely. To check the quality, I slowly raised to volume to max without anything playing on the speakers. At very high volume levels (around 98% to 99% max volume), there is a still a very small amount of interference...however I am only reporting this for technical reasons, if it matters to anyone. It is painful to listen to music at that volume anyway, I never use that volume level. For all intents and purposes, the noise is effectively cancelled. Especially when playing music, the sound is crystal clear, there is no background noise, there is no distortion at any volume level, and I cannot perceive any drop in sound quality.

Works perfectly. I'd been experiencing hum in my audio set up and a bit of research suggested that it might be caused by a ground loop. I tried this inexpensive device and it solved the problem immediately. Recommended.

I rebuilt my PC (new processor, motherboard and power supply - same video card, case, cables, drives). I now had a really annoying, loud buzzing on my audio output (connected to a high power amp setup - no cables changed...). The noise was worse when there was video on the screen, or even when I moved my mouse pointer. Clearly a digital signal interference somewhere! I tried re-routing cables. Adding (loads of) ferrite beads on signal, digital and power cables. Moving the power source so all came from a single outlet (to reduce earth loops). I tried using a USB sound card instead. I tried using digital coax output to an adaptor. All of these only reduced the interference very slightly. Following an on line suggestion, I ordered one of these inexpensive devices. I was really sceptical. It has COMPLETELY removed my digital noise now! At high volume levels, I also had a very small mains hum interference. This has gone too now! And there hasn't been any discernable impact on my sound quality! I am really pleased. Highly recommended for noise on analogue sound channels!