Review on 🎧 Enhanced 4-Channel Ground Loop Isolator: RCA Noise Filter for Improved Audio Isolation and Quality Enhancement by Brian Schultz

I upgraded my alternator to 390 amps. I grounded the alt but I still have whiny mids and highs. I bought it to filter out the whining. This only worsened the situation. The howling was barely audible in my rear speakers, but after adding this filter it really became more noticeable. No changes to the front speakers. I found it odd that this filter didn't have a ground wire, but I bought it because it was a 4 channel filter. I threw away the packaging like an idiot so I guess I'll stick with it. Next we try PAC.