Some have mentioned a ground loop isolator that worked for them

Isolate those filthy ground loops and trap them forever like the ghosts busters with those glowy-trappy things they used to throw out.

I had modified the transmitter to use the vehicle power (5v located inside the stereo head) and this caused a ground hum issue.

Already put in 1 recommended ground loop isolator some years back and the problem went away

My car doesn't have a properly isolated ground for the stereo and DC outlets, and it turns out this fixes it.

My Wiper Motor burned out once due to a bad ground during a long use

We had a ground loop or some otherwise annoying issue with the auxiliary port in a 2007 Mazda 3 hatch.

Must have for long car trips if you have a ground loop noise issue.

I have a 2007 Toyota 4Runner that had a bad ground (I think) which caused background noise that was in tune with the engine.

Those reviewers who had a huge loss probably had TERRIBLE ground loop and that is because their car is old or built poorly and the grounds got dirty or loose.

Mazdas have a horrible ground for some unapparent reason to me.

You want the device completely isolated by a transformer which breaks any noise ground loops to the stereo component.

It needed an isolated ground to make it function as it should, but it does help with the feed back when my wife is both listening to an audiobook from her phone and charging it at the same time.

I read that they can be fixed by either using a better ground to the stereo or a better ground going to the cigarette lighter

I returned this product because while it does stop the noise from a ground loop it distorts the audio far too much.

Initially the hands-free kit had really bad ground noise.

so it narrowed my choices down to few options, direct box or this cheap ground isolator

Worked perfectly as described, my problem was a poor factory ground between my cigarette 12v and my radio

If you are looking for a ground loop noise isolator, this product works perfectly

I had a bluetooth unit that had horrible ground loop, REALLY loud(Homespot NFC unit)

Humming / ground / engine noise while charging my iphone 4S was inmediately gone in my

I have never heard the existence of a ground loop noise isolator until a few months ago in a random slickdeals thread that discussed the high pitched whine associated to engine revving and phone connected to the aux port

Zero ground loop hum

if you have a bad ground wire it want work; but just normal static then

Does the job - it keeps ground loop noise out of your stereo

Had a nasty ground loop with my Nexus 5 and 2009 Chevy Traverse.

I HAD a VW rabbit with whining ground noise

Having both power and audio on the same device without some built-in isolation is prime opportunity for a noisy ground loop.

I check the Lexus forums, and it recommended using a ground loop noise isolator.

You only need it if you have a bad ground in your car or circuit in your car.

Overall, If I ever hear of anyone else having the static issue, I will recommend this ground for sure

Took care of a really bad ground loop.

I had a nasty ground loop in the center console AUX port when using my iPhone, it was super annoying.

Somehow, this was creating a ground loop and a hum between the audio system and the computer.

After installing the ground noise isolator the interference isgone !!!

I wasn't sure if this "ground loop noise isolator" would work on the static (which is not ground loop noise

The way it works is its circuitry isolates any ground loops in your stereo (depending upon how it was installed, you may have a bad ground and that can cause an annoying whine).HIGHLY recommended for anyone who wants to listen to their music and charge at the same time.

This ground loop noise isolator completely removed it

I started looking into in-car Bluetooth kits, and people mentioned getting ground-loop noise isolators to eliminate any interference

my car had really bad static/ground noise and this resolved 99% of the problem.

This ground loop noise isolator fixed the problem!

Had a really weird ground loop that was creating intolerable interference on my powered 2.1 speaker system for my computer

has terrible ground noise if plugged in to charge and play at the same time

Eliminated the annoying ground loop him after plugging in aux cable and charging at the same time

Other wise I can't hear it during normal use, I highly recommend this product of you need an in line filter for your audio input while you are trying to charge the device.