Car Power Filter EMI Noise Ground Loop Isolator Suppressor for Auto Stereo Audio Radio Stereos Amplifier Amp Speaker Equalizer Subwoofer 12V

I bought this a wile back and just had time to install it in my 2011 Nissan Cube and all I can say is WoW it works extremely good I am so happy to not here are the annoying alternator wine any longer 🙀 wen I bought it I got 2 of them one just so I had a spare if needed 😹but yes I will give this a 10 ⭐️ if there was 10 to mark but if you have alternators whining like I did I strongly recommend this product!

I can finally listen to my system without the annoying alternator whine! Installed in minutes and it works perfectly. Definitely worth the money and it's fits easily behind the dash. People aren't wrong about how thick the insulation is but it didn't hinder the installation in any way.

Would give a zero if I could. Dead short. Blew a 30 amp fuse immediately on connection.DO NOT BUY!!!

I installed this to kill the feedback I was getting after installing a new car stereo and it got rid of most of the whining. I had to install another filter to completely kill the noise

This absolutely works if installed correctly. Most of the Dual Electronics stereos have an alternator whine due to cheap or non-existent shielding within the radio itself. This is from my own personal experience with the brand. If your old car stereo did not have an alternator whine, and now it does, and you’re sure it the new stereo was installed correctly, it’s more than likely the build quality of the radio. To completely fix the whining noise, do the following: connect the Power Filter on the yellow, constant-hot (memory) wire between the vehicles harness and the car stereo. The “input” wire connects to the vehicle’s harness, the “output” wire connects to the stereo harness. Ground the black wire to a metal component attached to the vehicle’s frame. ZERO noise is now coming through my speakers when the truck is running. No noise on Bluetooth, AUX, radio, etc. Excellent product!

I was having a very audible static noise in my boat, I replaced every cable, wire, etc I could think of with no luck. I didn’t want to isolate a battery to solely power the radio so opted to try this. The static is slightly down but not completely gone. Overall, it did quiet it down but didn’t fix my issue.

I don’t know how it works, but it does. I run a mini pre-amp thru my boat stereo to use with a CB style mic as an inexpensive PA system. (Guided sightseeing charter boat).New boat had a ton of line noise when the engine was running. So much, the PA was not usable. I ran the 12v supply for the stereo and pre-amp thru this isolator, and it greatly reduced the noise. There is still some noise, but it went from un-usable to useable.To be fair to the remaining line noise, I have to crank the radio volume to 33-35 so my guests can hear me. That’s pretty high, and I don’t fault this product for not removing 100% at the highest volume.Oh, like others have said, the wire insulation is ridiculously thick, but the wires are maybe 14 gauge, and appear tinned. The thick insulation only makes butt connectors really tight.

I have a velex bluetooth amp that I bought from amazon 3 years ago. I isolated the static to the unit and I'm pretty sure it might be going bad. This is in a 1970 Monte Carlo. I figured I'd try this before placing the unit as I know its cheap and probably wouldn't last long. (3 years is good compared to others reviews of the unit). Surprisingly this removed 90% of the static, maybe more. Hoping it will help me limp along a while longer without replacing the unit. I can't hear any noise at all any more, maybe a crackle once in a while but before I installed this line filter it was unusable. Very pleased!