Customer Ratings & Reviews

This Noise Suppressor works. If you do not know how it works, because it lacks instructions, you may have to experiment to resolve your interference issue. Before the amp or after the receiver head, mmm that's the question. I installed this product in a 1978 Chevy Corvette with the main problem with engine noise. Let's see, 1978? The year of the Cat?

Received in a timely manner with no complaints. Would recommend.

Didn’t totally clear up the car idling sound but it’s much better.

I bought this thinking i had a ground problem. I eventually figured out that the car i owed has what they call "ANC". I have a 2008 pilot. Not all cars have an ANC. Honda for sure does. An ANC is active noise cancelling. Which there are microphones in the car that sence engine noises etc around you and emits sound waves to make it seem quieter. Its similar to noise cancelling in headphones. Prior to knowing this, i purchased this thinking again, ground issue. This did help with the constant loud buzzing sound they'd make without music on. This is actually good for alternator hum that you'd hear. I ended up doing research and so far i know honda uses ANC in their cars so i actually had to find the microphones for the ANC, not bluetooth, because theyre is both mics in the car, and unplug the ANC microphones and now the whole system works perfectly. If you dont have ANC in your car, this would work for you.

I purchased two of these filters (one for front, one for rear) after getting an annoying squeal that fluctuated with acceleration input through my Kenwood receiver. I noticed this was primarily coming out of my left-rear speaker. After installing these filters, the squeal has been reduced to barely noticeable levels (albeit not entirely eliminated). Installation was a breeze, as I simply unplugged my RCA cables from the factory amp into the radio and plugged the filter to run in series between the radio and the cables (it is even simpler than it sounds). For my installation, I didn't need to hook up the brown ground wires, it just worsened things if they were connected. Overall, good product and I recommend them if you are experiencing similar issues.

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.

I have an aftermarket stereo in my car and an amplifier, the stereo has a phone setting and the people who called had to listen to an annoying squeal, now that the ground loop isolator is in they don't have to listen to it anymore. Easy installation and it worked well.

Great little device. before tearing your computer down to see where it's not grounded properly (because it probably is) do s simple check. Are your Stereo and your PC on the same power circuit? If yes you might get that annoying 50Hz to 60Hz buzz from your speakers. This fixes the issue because it was designed to do so. It isolates and traps the ground loop feedback and - magically - no more buzz. It's a 2 minute fix that the stereo folks have know about for decades (because it's an analog issue not a digital one). If you have it though the audio inputs it's easy. They make ones for 1/8in plugs as well but this one fit my need perfectly.

Works perfectly! No more alternator noise! Just install between your music source and the radio input.

Two of these ground loop isolators were required to knock out engine noise in my Audi A3. They really do work.

bought this item to remove electrical hum loop between laptop and mixer console caused when HDMI cables also connected in for Karaoke setup. some loss of bass end requiring EQ compensation, but not an issue.

The product does what it says. No instructions but if your buying one you probably know whats going on. Cant say much about it, however the audio techs you have at the Boynton Beach congress are awsome. They know who they are. Very knowledgeable went above and beyond to help me do a custom audio job as far as whats needed ,doing the research looking for every possible options. So to the i give 5 stars

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!

Added an after market amp and sub to my factory Acura radio. Had a bit of alternator noise through my speakers. Got this product and it took care of the issues.

Great item help me out a lot no Winning sound or any feed back from my car after getting this item installed great choice, great price, and big difference in my music.

Plugged in right behind my head unit and then ran my RCA from it to the amp. Cleaned up the low humming noise that I was getting. 

It suppossedly works, its just not the answer for problem. But I bought it online from Best buy and showed up to get it and they were awesome and it was quick in and out. Unfortunately I'm still dealing with my ground nuke issues. I think I would pay somebody a million dollars if they could just come out here and solve it for my truck and all the money I spent on stereo equipment that I can't enjoy really. I'm awesome at home remodeling that car stereo. I'm not so good apparently.

This is a good product, does what it is intended to do. Cancels busing noise on radio.

Worked great, fixed ground noice!!! No more wining coming from speakers.

I purchased these to combat a noise issue in my Corvette. When you would turn the aftermarket radio on or off, the factory amplifier would turn on before the radio so you would get a pop from them. Putting these in line removes the physical connection (inside the box is a transformer, so the signal transfer happens over an air gap) that DC power can travel through, and eliminates the turn on/turn off pop. NOTE: THIS WILL NOT WORK IN MOST CASES. My use case is very specific and a misuse of the item, but it gets the job done.