Car Audio EMI Noise Filter Ground Loop Isolator 12V Power Line Suppressor for Stereo Amplifier Installation

Firstly, I must point out that I am not an audio technician. I'm just somebody who enjoys having a go at upgrading cars I own as much as possible. Having purchased a BMW e91 Touring M-Sport recently, I also purchased a replacement Android stereo to allow me to have DAB+, Google Maps, hands free calls etc. etc. Fitting the stereo was much easier than in previous cars, the (CANbus compatible) wiring was pre-configured to allow the steering wheel controls to work out of the box; not something I've come across with previous Japanese cars (Lexus and Toyota). Having fitted the stereo, everything worked as expected. However, I had lots of noise/interference through the speakers. Both DAB+ and FM as well as with nothing playing. It was a mixture of a high pitched tone that changed when accelerating and a lower pitched 'crackle' type of sound. Research suggested numerous potential causes, but most people pointed to alternator whine/ground issues as the culprit. Anyway, fitting this box (which was very easy for someone with a little bit of knowledge about wiring) has resolved the issue entirely. All the unwanted noise has gone...nothing. No interference, crackle, whine, high pitched tone or anything other than whatever I'm playing on the radio! Perfect. I'm so pleased, this product exceeded my expectations!

does not state its max input and output i dare not use it if it goes over 12 volts it may blow burn up a car battery can reach 14.4v this does not state that it can so i will try return as i havent used although cant find little bag it came in

Got this to attempt to get rid of some audio noise from my tube amplifier powered by an LED power supply. Well in short, it worked! Don't know why insulation is so thick for such thin conductors. Would rather have thicker conductors to help with resistance.

Does the job... no more buzzing. The wires are small gauge but the insulation is crazy thick, I had trouble fitting them in to the wire stripper !! Would definitely recommend

Wasn't sure if I should give this 2 or 3 stars. I can't say it doesn't work which is why I won't give it 1 star , but I can say it didn't work for me at all. Made no difference to the alternator whine. I tried installing it on the power to the head unit, & the power to the amp that runs the 4 door speakers without any effect.

I bought a Car Power Filter EMI Noise Ground Loop Isolator to get rid of the annoying noises in my car stereo. I was having alternator noise and other noise come through before, but now it's just the tunes that get through. It worked a treat, just what I needed. I'm very happy with this product and I recommend it to anyone who has the same problem.

Used 1 on the rear camera 📷, 1 on the head unit display, seems to of reduced/stopped the interference on the rf

It didn't worked for me. The problem may be something else.