Best Car Noise Filters of 2025

"As a professional audio engineer, I was blown away by this product! I had a lot of noise in my headphones due to my complicated setup, but after plugging this device into my Kaoss Pad output, all the hum disappeared. Just pure, beautiful audio. This little thing saved me hundreds of dollars in filters and cables!"

"I was skeptical at first, but after installing these in my 1982 Corvette, I was amazed. They completely eliminated the awful buzz I was experiencing, even at low volumes. If you're dealing with noise in your sound system, stop searching and just buy these!"

"I bought this to solve a ground loop hum when connecting my desktop to a mixing console. While it did cut out the hum, it also made my sound overly reverberated, losing most of the mid-range frequencies. I reached out to Amazon, and they were great about sending me a replacement, but it had the same issue. I appreciate their customer service, but I'm not satisfied with the product."

"I don’t know how it works, but it does. I run a mini pre-amp through my boat stereo with a CB style mic as an inexpensive PA system. My new boat had a lot of line noise when the engine was running, making the PA unusable. After installing this isolator, the noise greatly reduced. It went from un-usable to usable, although I still have to crank the volume up to 33-35 for my guests to hear me. I don't blame the product for not eliminating all the noise."

"I was dealing with a very audible static noise in my boat and had replaced every cable I could think of without success. I didn't want to isolate a battery just for the radio, so I decided to try this. The static is slightly reduced but not completely gone. Overall, it quieted things down, but it didn’t fully resolve my issue."

"I recently got into big audio with the DSR one and had issues with a bad alternator. I could hear electrical problems throughout the car. After installing this filter, the noise disappeared. I can hear a slight alternator whine if I focus on it, but it’s hardly noticeable. This product worked as intended, and I would recommend it to anyone facing car electrical noise issues."

"This noise filter works great for me. I experienced no white noise or alternator whine, just clear stereo sound."

"After searching for a solution for months, I found this affordable noise filter. It completely eliminated the alternator whine in my 2004 Mustang. I can't believe it was this easy!"

"I had RF noise from a power supply. I added the filter, but it changed nothing. Still, I won't fault the product since there are so many variables involved."

"Initially, I had trouble with this product. I followed the instructions to connect the red wire to the power source and the blue wire to the device, but the difference was minimal. After reading another review, I switched the wires, connecting the blue wire to power and the red wire to the device. That finally worked! The noise reduced dramatically, and I can now get radio reception while using the USB port."

"After replacing my radio head unit in my 2002 Mitsubishi Eclipse GT, I noticed ignition noise even with the volume down. I installed this filter as directed but was disappointed it didn't eliminate the noise. However, I remembered reviews suggesting connecting it to the yellow constant power instead, and that did the trick! I found it didn't matter if the black wire was grounded, so I left it disconnected to prevent battery drain. Including these tips in future packaging would be helpful for customers who don't read reviews."

"This filter worked wonders with my Jeep's CB radio. I created a plug-in harness to supply a GMRS radio simultaneously. The CB had annoying ignition noise, but after adding this filter, the noise is completely gone, even with the ANL switch off! While the installation directions were a bit vague, I connected the red wire to the +12 volt source, the blue wire to the radios, and properly grounded the black wire to the chassis. Overall, I'm very satisfied with the performance!"

"I was having a massive static noise in my 2003 Honda Odyssey after installing a Boss amplifier. After trying multiple solutions, I was desperate enough to give this RCA noise filter a shot. To my surprise, it worked wonders! The noise is totally gone! I highly recommend trying it, especially since you can return it if it doesn't help. Just a bummer about the price drop from $6.46 to $4.50 shortly after my purchase."

"I struggled with a lot of buzz and hum in my sound system after getting a new laptop for my PA. I spent months troubleshooting different issues, not realizing I was dealing with ground loop interference. Once I connected the InstallGear Ground Loop Isolator Amp Noise Filter, everything sounded clear and perfect. I wish I had asked for help sooner!"

"Initially, I was skeptical about this product’s effectiveness, but after installation, I was amazed at how it drastically reduced static on the radio. It even helped eliminate feedback caused by my Solar power system. It's easy to hook up and fits perfectly. I’ll definitely keep using this product!"

"I ordered this product, and it shipped the same day. I installed it on my marine hailer to eliminate feedback noise, and I'm pleased to say it worked great and was easy to install!"

"After installing an all-new stereo system, I was struggling with a loud whine noise when the engine was running. This device installed behind my stereo receiver completely eliminated the alternator noise, leaving just a barely noticeable static sound. The installation was a bit tricky for me as a first-timer, but it was worth it!"

"I gave this product a shot after dealing with annoying engine noise from my cheap CarPlay radio. I used one suppressor for the Constant 12+ and another for the Switch Power cable, and it worked like a charm. All the noise is gone! Though it was a bit pricey, I definitely think it was worth the investment."

"I installed an aftermarket stereo in my 1998 Ford Ranger XLT, and the radio had a deafening whine noise that made driving unpleasant. After some research, I found this device and decided to give it a try. Installation was easy, and I followed the directions closely. Once installed, the annoying whine instantly disappeared, making my driving experience much more enjoyable. Now I can listen to my tunes in peace!"

"Initially, I was skeptical about this filter because of mixed reviews, but it worked like a charm for me. There’s absolutely zero whining noise coming from the speakers now, and I’m very happy with my purchase!"

"I’ve installed this noise filter on my car audio amplifier, and it solved the alternator whine issue completely. The only reason I didn’t give it 5 stars is that I feel the wires are a bit small. If they were 8 gauge instead of 10 gauge, it would have been perfect!"

"As a truck driver, I enjoy using my tablet to listen to my favorite home radio station while on the road. Charging the tablet used to produce a lot of noise and humming, but this device completely eliminated that issue and seems well-made, holding up to the bouncing in my truck."

"I bought this specifically for my wired headset with the PS5 controller. Many users reported static noise, so I decided to give this a try, and it worked perfectly! It’s a bit cumbersome to use, but it’s a cheap add-on that completely removed the static. I do have to increase the volume slightly, but it’s not a big deal."

"I recently set up a portable CarPlay system, but the aux cable produced annoying static and humming during audio playback. After using this adapter, the noise significantly decreased, and I found that the bass wasn’t compromised too much. This was a worthwhile investment, and the audio quality remains excellent!"

"I ended up not needing the product because I just rerouted my ground to the battery, which fixed my problem. However, it's still a great and useful product, just lacking instructions for beginners like me."

"While I think the product is functional, I couldn't manage to eliminate the noise. I'm not very knowledgeable about this technology, and my equipment is quite old."

"I really love their products, but unfortunately, this one didn't solve my issue. My alternator was failing, which ruined my equipment."

"I found that this product eliminated all the engine noise from my car radio. The installation was a breeze, and so far, it’s been working great!"

"In my experience, this filter did help reduce noise when using Android Auto. However, it was more effective when placed between the factory stereo and power, rather than between the power supply and the device."

"While it didn’t completely solve my audio issues, it did provide some attenuation to noise. I would suggest looking into other options if you're seeking a complete fix."