Customer Ratings & Reviews

I bought and tested this Metra TruConnex TC-GLI Ground Loop Isolator and it works! No high pitch whine noise at all. I was expect a tiny bit at high speaker volume but none is present anymore. My guitar signal is fine from my Blackstar HT-1R practice combo amp (clean channel with my pedalboard effects) through my Focusrite Scarlett Solo 2nd Gen and gain levels good in Reaper software too. Now I can start having fun learning home recording without the annoying hardware issues. Best Buy and TruConnex TC-GLI Ground Loop Isolator saved the day!

Got this to eliminate a buzz coming from my head unit. It lessened the buzz to a point where I can’t even hear it. Did its job for me.

Nothing Fancy. Plug and play it does its job and I've had no problems since installation. I would buy it again if necessary.

I bought this isolator to eliminate noise from my auto stereo. It was really easy to install. When i installed it and turned on my stereo, the noise was still there so i thought it was junk. However, i found out later that the noise was from a loose wire so im giving this 3 stars because i dont really know if it works or not to eliminate the stereo noise. In regards to buying it, it was cheap and easy to order and pick up at the local best buy. Overall, it was an easy transaction

Hard to fine, literally called a store that specializes in DIY (do it yourself) fixing technology and they had no idea what I was talking about and told me to check Home Depot. I needed this because of a "Hmmm" noise coming from a car sub woofer I installed in my home. The aux from this device is connected to my television, while the output is going to the cars audio amplifier. The ground wires from this device is also connected to the amplifier in the ground terminal. Problem fixed!

Connecting the ground wires to ground made buzzing worse. But leaving the ground wires unhooked fixed my buzzing.

Took the squeal out of my truck speakers after installing an aftermarket stereo. Wish I had known about these sooner.

Works great and great price… no problem at all I would recommend to a friend or family member.

Very easy to integrate into my oem stock system Lexus LS 400, they have things know one does!

Easy to install. Works good. I have another issue so this didn't completely fix my issue.

Had ground noise between guitar amplifier and PC in home studio. This was just what I needed and worked well.

Totally muffled the sound feedback. I did not think it work, but it totally did. I would buy again.

This thing works great for killing ground noise on a powered connection.

I installed this in my Escalade to stop the feedback while the TV's were playing. Easy install works great definitely recommend.

This is used to cancel the high pitch alternator noise when using an amp for your speakers. Great price, great product.

Got rid of that hissing noise in the background. Works great.

Works just as it should. I still have some noise in my system so I’m going to add another one for my subwoofer amp as well.

Very easy and simple to use. Noise got reduced by 80%. Unfortunately, remaining 20% still bothers me.

Slight reduction in lows but not a deal breaker. Works with blackberry Bluetooth in my car pretty much allowing iphone to work over Bluetooth.

My stereo had a humming coming out the speakers and this stopped it from making that sound