FMUSER RCA Audio Ground Loop Isolator, Hum Noise Eliminator for High-Fidelity Stereo Home Theater & Car Audio Players with 3.5mm Ground Loop Noise Isolator

I needed this to eliminate a ground loop hum between my PC and an external audio amp. Worked great. Note that there is a switch that must be flipped accordingly to lift the ground as needed. Audio quality seems fine since it’s only MP3 music. Probably wouldn’t buy this for a million dollar recording studio but for my needs, this was an economical choice.

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To say I was skeptical is an understatement. I plugged this in to the RCA input coming into my PS Audio AMP and the 60Hz hum/Buzz is completely gone. I mean completely gone. I replaced electrical outlets, replaced cable and still have major noise. I installed this FMUSER RCA Audio Ground Loop Isolator and my music system now is dead silent even when I turn the volume up and there is no music playing. Great device. Get one whenever they are back in stock! So happy here!

Paid a little more for this unit than others here on Amazon with mixed reviews and did not disappoint, eliminated the hum and solid build quality. Highly recommend!

Yes! It took out the distortion noise out! Great unit, I can use my Karaoke without any disruptions.

It did not make any difference so I returned it.

Used this on a church PA system, solved the problem.

Works great, eliminates any noises/humming when converting from mono to a stereo output. Would recommend.