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

No more annoying buzzing from my speakers

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.

Surprised by how well this works.Have a wireless headset which can simultaneously play audio via USB from my PC, and a 3.5mm line in from another source. Only problem was a huge amount of interference/static noise coming through the 3.5mm cable.After adding this device the interference noise is completely gone.Also like the plain black appearance with no branding.Overall very happy with this cheap and simple solution.

Reduces interference but makes the car stereo sound really tinny! No good I'm afraid

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

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!

Changed audio mix amps recently for gaming and have had a terrible buzzing noise emerge. Spent days trying to figure out how to stop it and came across a video that suggested to use a device like this. Gave it a go and it worked perfectly, buzzing is gone!

I plugged this in, and it just worked. I can't complain. I was experiencing an annoying ground loop issue with electromagnetic interference coming off my GPU, or perhaps some issue with the shared power rail. The sound coming from my speakers was unbearable, with the ability to hear the mouse move through the speakers being particularly strange.

Totally eliminate the noisy interference via the ground loop on my installed Car Head Unit and the CD Player AUX input. Sounds perfect with such a cost effective solution!!

Happy with the product it works good, just there is some room for some improvement for sure.I have my gaming headset that I had lots of background buzzing noise and I was on google and Reddit and lots of people were suggesting to try a ground loop filter, so I got this one and overall the product did excatly what I wanted it cut out so much of that background buzzing noise in my headset the only thing is if I go to a higher volume I do get some of that background buzzing noise but it’s not that often I do need to have my headset that loud but that is where the product could use some improvements, but overall it cut out the noise in my headset and does exactly what I needed it to do.

I used this as a ground loop isolator for an aftermarket CarPlay install. The vehicle itself had amazing audio quality through Bluetooth and AUX, though I had heard issues with the AUX needing a ground loop isolator when the CarPlay unit was installed, so I bought this in advance.Putting this thing in the audio path made me think the CarPlay unit was broken. The audio quality was AWFUL, with some frequencies being completely lost and others attenuated significantly. Bass especially took a hit and any attempt to bring it back in EQ was muddy at best. A quick sanity check with a side-by-side comparison -- removing the isolator from the audio path -- proved definitively that this thing completely destroyed the fidelity of the audio being sent through it. Avoid.

This ground loop isolator seems to do its job, it got rid of all of the noise that was caused by connecting my carplay/Android-auto mirror to the sound system.The only two negative points are:It slightly reduces the treble frequencies (which isn't bad enough that it can't be compensated for by adjusting the treble control)If the cable has any pressure on it you can lose the right channel, as I found out when I stuffed it behind the dash. It was ok once I re-adjusted it.I've only removed one star since it is a really cheap passive device. It's good enough for the price.If I have any issues with it I'll update this review.Hopefully you'll find this helpful. 😃

If you have noise while driving in your speakers that varries with rpm, this product will solve it. I had a hum with my aux while driving and playing music. I no longer have this hum.