ZIOCOM Ground Loop Isolator, Noise Filter, Eliminate The Buzzing Noise for Your Car Audio System/Home Stereo with Jack 3.5mm Audio Cable(2 Pack)

The ZIOCOM Ground Loop Isolator (2 Pack) is of decent build quality. It has a 1:1 transformer-based design that separates the grounds between the input and the output. I tested this with a multimeter, and indeed, the input and output grounds are separated and the transformer winding ratio is 1:1. Given its transformer design, the input and output are interchangeable, with a gain slightly less than 1 due to transformer loss.Currently, I don't have a ground loop noise problem, but this tool proves handy when such a problem arises. I tested the sound quality of the isolator and found it hardly noticeable when inserted, unless one has an audio switch to compare the before and after audio instantaneously. I did that and noticed that the high-frequency components of the audio had been slightly rolled off. However, if you're already experiencing a ground loop problem with noisy audio, this is a small price to pay to clean up the audio.Overall, I find the ground loop isolators very handy, with 2 cables included. I am fully prepared to troubleshoot any ground loop problem if it arises in the future. I am happy with my order.

I was having some feedback and noise issues on my stream and with these 2 I was able to make it work without any problems!

It has solved a number of noisy connection problems, including line noise from an electrical circuit.

The ZIOCOM Ground Loop Isolator is a good solution for that annoying buzz or hum.I tested these isolators on an amplified speaker that hums. Perfect. The hum was gone immediately.Insertion loss seems minimal. I didn't notice any loss at all. If there is a slight loss it is not important.I tested frequency coverage and also found no issues over the audio range of 20 Hz to 20 KHz. Just fine for audio purposes.The quality is fine plastic construction. No need for more in this case. For high quality audio at low levels they should be in a metal case, but we are not talking studio quality devices here.Very happy with this product at the $25 price for 2.

I have a setup where I have a mixer in place so that I could share my desktop speakers with my Laptop and my Desktop PCs. I was often getting a hum, and some research suggested is was a ground loop issue. This arrived and I plugged it in and launched the program that made the hum the worst and no hum. Well worth it in my case.