Smof Upgraded Ground Loop Noise Isolator, Noise Filter for Car Audio/Home Stereo System (Eliminate The Buzzing Noise Completely) with 3.5mm Audio Cable, Black | Noise Filter for Car Audio/Home Stereo System, 1 pack

Works as advertised. Completely eliminated the white/ground loop static noise coming from audio out of a fairly cheap ($20) mixer :) From what I could tell, I can't detect any static noise anymore.

My situation may be a little bit unique but this Smof Ground Loop Noise Isolator is an absolute godsend. This completely eliminated all alternator noise I was getting through my car stereo. I own a 2005 Subaru Outback which didn't come with an aux in port and didn't have an easy way to add one. I considered replacing the stereo with an aftermarket unit until I found out the climate controls were integrated into the stereo and would cost a minimum of $250 just for aftermarket climate controls. I tried a few different FM modulators but struggled to find a station that consistently worked on my drive to and from work. As a last resort I found instructions online on how to hack my factory stereo and install my own aux port inline with the FM tuner. With nothing plugged into the port my FM radio plays; with a cable plugged in it plays from there. I spend a day modding the stereo and everything sounded fantastic while testing in my driveway. Later that day I started the car up and got my phone all hooked up only to be greeted by a horrible alternator whine screaming over my speakers every time I hit the gas. That is where the Smof Ground Loop Noise Isolator comes into play. I searched Amazon and based on the good reviews and price of the Smof I decided to give it a try. From the moment I plugged it in it has provided crystal clear audio. I now pair my phone to a bluetooth adapter which runs to the Smof then to my modded aux port. I have enjoyed hundreds of hours of audio books and music. The music playing from my phone through this setup provides significantly better audio quality than FM radio or CD. I could not be happier with this product and I'm so glad I decided to purchase it.

The product is a ground loop isolator. What I understand is that it prevents a wire from picking up noise from the wires running inside the house and prevents the wire from acting like an antenna for, perhaps, a nearby radio tower like I have a few 100 feet from my house. I have been linking a lot of synths together with a small mixer and did find some noise that my speakers played. I inserted on of these in the 1/8 stereo RCA jack as instructed and the problem went away. I have used 3 of them so far and may use more. The product works as expected for me and was very easy to use. They are affordable and feel sturdy.

I recently built a new gaming/music production PC. I route the output of my soundcard to a mixer and then into a power amplifier. It seems like there is some kind of ground loop that injects noise caused by my graphics card into the sound output, especially when gaming. This unit greatly (but not completely) reduces the noise when not gaming, e.g., when listening to music, and reduces it enough that I can play games without using headphones. I detect no problems with the sound quality at any frequency. Also, changing the volume on my PC or on the mixer does not change the amount of noise I hear, unlike when I am not using the unit. The only nit is that the 3.5mm stereo cable included isn't the highest quality (and may be the source of the residual noise) and required some jiggering to make a stereo connection. Still, well worth the price.

I have an Apex brand TV and a set of Sylvania brand speakers, both quite old. When I tried plugging the speakers into the TV's headphone jack, and used an A/V or HDMI device (such as a Nintendo Switch), the speakers started emitting a very angry "BRRRRR" sound (through which all other sounds came through). This has been the case with this TV and other sound devices connecting to it (such as headphones) since the beginning. The speakers do not do this if plugged into something else (such as said Nintendo Switch). Someone recommended this item to me to fix the problem. As is always the case for me, this did nothing whatsoever to help. The speakers acted like nothing was different. The angry drone wasn't even slightly reduced in volume. So there goes that money, used on a 6" extension cord as far as I'm concerned.

This product works perfectly! I use it to isolate noise when using my PC Line In or AUX IN in my car. I have bought three because they continue to serve me well.

tl;dr: it works, and cleared up the signal for those mobile/portable airplay car stereos so much that the sound is clearer that connecting directly to the car stereo via USB aux. Didn't expect it, give it a try if you really wanted your stereo to work but the bad background interference and noises made have you ready to send it back. I don't want to shell out money for a real stereo system yet so I bought a mobile stereo device. The stereo was good but had really bad interference and noises with when connecting to my stereo via 3.5mm aux. I prefer connecting to my stereo with either 3.5 or usb aux because the sound quality is much better than a regular bluetooth connection (at least for my car). That noise had me ready to return the stereo which was a bummer because it did carplay and stuff really well at a super cheap price so I decided to give this ground loop a try as I read one person saying it helped for them and I thought it was worth a shot. It totally works, against all my expectations this thing not only made the aux totally clear for the portable car stereo, but when comparing it to my preferred usb connection quality I found that it the USB actually had more background noise. Somehow, connecting my iphone to the stereo via bluetooth, with this thing connecting the car aux, it sounds better than my phone's direct usb aux connection. I tested it by playing back the same sections of a song on both USB directly from my phone to my car stereo and with this filter between the aux of the portable stereo into the car 3.5mm aux connections multiple times, and also when the song was paused turning the volume up all the way to listen for any background/interference sounds. The interference totally disappeared from mobile stereo into the aux and I then realized that my previously preferred usb connection had a ton of noise in the background because of the comparison. Hope this helps, this thing totally cleared up a horrible signal.

It works I suppose. I didn't have a lot of noise. It was only noticeable when I had the volume turned up and nothing playing. This cut the noise down pretty well but it also killed all bass and turned it into a muddy mess. I never REALLY understood the phrase "muddy bass" until this thing. It legitimately makes it sound like I'm listening to a speaker that is face down in mud. Unless your static is REALLY bad I wouldn't bother with this thing. Ruins the quality too much to be worth it. I'd rather keep turning my volume back down when nothing is playing.

⭐️⭐️⭐️⭐️⭐️ Zauberrei 😊 Funktioniert bestens, kaum zu glauben! War ein heißer Tipp von Gemini für mein Funk-Setup vor dem Audio-Kompressor, der zog das Chip-Säuseln in den Sprechpausen hoch, jetzt habe ich AST-REINES AUDIO!

Redujo el zumbido completamente

ラパン２２の純正スピーカーと純正CDオーディオの裏から出したAUXで、DACコネクタを介してグーグルピクセルのＵＳＢ-Ｃから曲を聞いていました。 ラジオっぽい音だったので、5V駆動で3.5ｍｍの入出力が付いたのヘッドフォンアンプを入れました。 ラジオ感も減衰し、音の輪郭と圧も出て、良くはなったのですがどうも高音のシンバルなどのシャリシャリ感が否めず、ＥＱでトレブルをマイナスにして対処していました。 ですが、こちらの商品をヘッドフォンアンプとＣＤオーディオ間のＡＵＸに挟んだところ、全体的に音の分離がハッキリし、高音部のシャリシャリ感だとおもっていたものはノイズだったことが分かりました。それどころか全体的に霧の様にノイズがのっていたのでしょう。その霧が全体的に晴れて、スッキリクリアになりました。 おかげでＥＱのトレブルも下げ、マスターした時の音源に近い状態で聞けるようになりました。良い商品だと思います。

Perfecto, funciona sin problemas.

Problema solucionado ✅️, tenía el típico zumbido en los altavoces, el sistema era un radio y un míni amplificador de 2+1,la verdad que no confiaba mucho en el filtro pero me sorprendió mucho, ahora el sonido está muy bueno y limpio de parásitos, genial recomiendo mucho,quiero añadir también una cosa la calidad del cable rca es muy importante los típicos cables chinos rca te van a dar mucho dolor de cabeza, los mejores son los que vienes con las puntas bañadas en oro y empantallados (bien aislados)