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

Pointless, Did not work at all.

Fake item, does nothing to filter the power noise, the noise is still there and the device has high standby power consumption of 3 Watts. don't waste your money.

The whine in the speakers was killing the music, found this and decided to give it a go, worked as intended, no more whine from speakers at all, toyota owners will appreciate this filter

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.

Fast shipping ! Does not seem to affect the signal at all (which is good)

Two of these bad boys hooked together and all the alternator whine was gone completely. I’m very satisfied the sound quality is great. Have these hooked to a 400 watt amp and it worked out perfectly.

Did what it was saposed to just didn't do the full job