Review on 🎧 KRIPT Noise Filter Ground Loop Isolator: Say goodbye to Car Electrical Noise with permalloy core Transformers! 3.5mm Audio Cable Black by James Julien

It works great. I have a cinema room with a projector and in another room I use an amplifier. I am a music lover and have high quality audio equipment. I ran a good quality audio cable to the amp using a 50ft stereo cable. When connecting, I immediately heard the hum of the ground loop. I used this product because it needed to have an almost flat sound in the 40-20,000 hertz range. Even if it were 100 or 150, it would be in the subwoofer range. I haven't tested this with an oscilloscope, but I hear fine and the tone seems to be flat in the audible range. It sounds good. I'm perfectly satisfied. I listen to music videos and concerts in the theater hall and am completely satisfied. The block looks well made. In theory it should work. The transformer for each of the two audio channels carries only an AC signal, and the audio output from your device is an AC signal. The ground loop background is a DC signal, and a transformer cannot pass a DC signal. In practice it works. Sounds clean and I'm completely satisfied. The ground loop background is a DC signal. As a result, no permanent signal is passed through. If you have an AC signal that is causing interference, this shouldn't work. Better quality cable or shielded cable may be suitable. In ground loop noise, which is probably 99 percent of the interference in an audio system, there is ground loop hum at various frequencies. It is well made, inexpensive and works great. Hope that helps.