Ground Loop Noise Isolator for Car Audio and Home Stereo

After swapping the factory stereo in my '96 Corvette for an aftermarket head unit, I got annoying crackles and pops through the speakers—classic ground loop issue. This InstallGear ground loop isolator took care of it right away. Plugged it inline on the RCA cables, and the noise disappeared completely; audio is clean and quiet now, no interference at all. The case is plastic but feels solid and well-built for the price—connectors are snug, no flimsy vibes. Super cheap compared to dealing with wiring headaches, and it just works perfectly. No complaints; great little gadget for older Vettes with aftermarket upgrades.

Could not get rid of alternator whine through speakers. Inspected and isolated all grounds so they grounded to body at different points. Did not have any grounds connected to battery which may have helped in retrospect. Moved radio ground away from harness and directly to firewall. Replaced cheap Chinese coils with ac delco which is Oem. Still had buzz but improved slightly with every change but would not go away. Removed capacitor from sound system to see if it was the problem. Nada. Finally got this and whine is 100% gone! Sound quality is arguably muted somewhat, kinda like a wet towel over speakers but not bad. I was able to fiddle with highs, lows and bass boost to get it sounding almost perfect but some clarity /sharpness is missing, but very minor. I only have about $300 total in system besides the aftermarket head unit that cam e with car so we are not talking big bucks here. Got aftermarket door speakers, amp, to drive them and a self powered sub. It’s not top shelf stuff, I know, but it is a s10 pick up bare bones., no jump seats small cab. Sounds perfect for what I need, loud enough to blast it without distortion but I don’t try to shake the ground.I also bought the out of box item and it was still perfect.

The only way these couldve been less functional is if they made the noise worse. They literally did nothing.

At the end of the day, it helped noticeably reduce the engine whine in my new car audio system. Now here's the backstory if anyone can relate: A year or so ago I had an aftermarket car stereo installed in my project car, 2002 Celica GT. The new stereo was nice, but it had no balls. So about a month ago I bought new speakers for the front (Rockford Fosgate component) and the back (Kicker full range 2-way), and a new class D amp (Jensen). Also, a powered subwoofer which has its own channel on the head unit. Did all this work myself with some help from my brother who had just done this in his Camry. Long story short, I couldn't get rid of the engine whine (buzzing sound that changes with the RPM's) no matter how many different ground configurations I tried. So this was a last resort quick fix that I did hoping just to hear an improvement. My expectations were not high. The noise reduction is absolutely noticable, and I am very pleased. The hum/buzz is still there, but it's only about 30% of what it was before. It's easily 70% gone at this point. *I should say that in addition to this, I also applied 3 clip-on magnetic ferrite noise filters to the stereo's Constant (power) wire (purchased separately). One last point: I'm a big do-it-yourself guy, so I'm going to keep tweaking the system and looking for ways to eliminate the noise altogether. However, I am not a professional which is evident by some of the other glitches I'm seeing in my newly upgraded system. At some point, I am probably going to take it in to a professional to have it fine tuned and all the little bugs removed. Moral of the story: Do it yourself if you can. If you find out later that you can't, and you have the money, take it to a professional.

Found some other comprible isolators for about double and triple the cost, but was unsure that this would resolve my problem and didn't want to spend too much money on nothing. Took the dive after reading some reviews. Slapped em in the truck in 30 seconds and drove around the block, no more whine. People not having luck with these are probably not diagnosing their issues, making assumptions that this is their problem, and wrongfully accusing their incoming signal as the issue. This is all these are designed to overcome. Not grounding issues or internal amp problems. For anyone with similar symptoms: 2020 F150 with an NavTV A2B Zen Module feeding 4 channels to an AudioControl D-4.800. This amp pre-outs to an LC-1.1500 for a pair of JL 13Tw5 subs. The 800 feeds 2 channels of tweeters and 2 channels of subs from the Morel Virtus line. I was getting alternator whine at roughly 1500 - 2300 rpm, no matter the load on the engine. I verified the whine was not isolated to any RCA input by unplugging and verifying one at a time. Then verified it was not due to any interference from my power and ground wiring by driving without any RCAs hooked up, meaning the whine stopped with no inputs, only power/ground and remote turn on. Plugging the RCAs back in brought back the whine. Installed these in between the zen module and the RCAs to the amp - whine gone. Works like a champ. No noticeable deterioration in sound quality, either.

I’m gonna be honest I wasn’t expecting this thing to do what it was suppose to. But I guess I was wrong. It really did cancel the alternator noise that was going through my speakers. HOWEVER the downside to it is that it reduces the loudness or bass of your speakers. To me this product is either a win lose or a win win. Depends what the outcome is to the customer. I’d love to give this item an epic 5, but reducing the sound quality really kills it for me.

It does exactly what it says!!! Overly impressed!!!

If you're like me, you rewired your whole system, watched a dozen YouTube videos, and went on countless car audio forms looking for a solution to your whining stereo. Well, the hunt is over for me, SWEET relief once I plugged this thing in! Whining went from noticeably obnoxious to a careless whisper barely noticeable over the engine itself. The noise is not 100% gone but I'd say 90% gone. You'd only hear the noise if you were listening for it. I plugged the Male ends into the back of my head unit, And the female end plugged into the male ends of my speaker wire headed to the amp. It's clearly labeled which end goes where so its hard to mess it up. i did not have high hopes for this device working as I've read the reviews, but if it aint broke dont fix it. I am going to screw down the head unit and hopefully not have to mess with those wires again for a long time. 10/10 would recommend, like I said it doesn't completely go away but it's not NEARLY as loud & that's good enough for me.

De 2 rizas que comore una servía y la otra No . , por lo que tuve que pedir una tercera y luego devolver la no funcional

Struggled with buzz, hum and what sounded like line contact issues after getting new laptop for my PA. Tried everything, and I mean EVERYTHING else. I have been DJ'ing and hosting Karaoke for 37 years and this is the first time I had encountered ground loop issues, so it never occurred to me to ask the RIGHT question; I just kept trying to fix things I was familiar with. Finally did a search and just asked the internet what was wrong without telling it what I thought it was and finally got the right answer: Ground Loop Interference. 24 hours later, I have the InstallGear Ground Loop Isolator Amp Noise Filter connected and everything sounds clear and perfect. I wasted months because I was too stupid to ask for directions and got lost and frustrated for my troubles.

It doesn't cut the noise when the audio is Playing. I connected it even serially and checked but nothing works. It just cuts the noise when nothing is playing on the car stereo.

It doesn't work. I won't recommend it.

I can't believe how good this works. Instant fix. Plugged into my Scarlett Solo USB interface and then the noise completely disappeared. My room got so quiet I thought the speakers turned off. Clearest audio signal I've heard ever since setting up my pc. For those wondering I have KRK Rokits and the Scarlett Solo USB interface I would have spent $50 on a fix but got this on sale for $10!!!!