This inexpensive box does indeed cure the ground loop interference that plagues us musicians/audiophiles. If you can hear your computer's inner workings or your car's engine in your music as noises then you have a ground loop. Later, I moved on to the Hum-X for better fidelity since I mix and master music on my speakers, but an snl-1 will surely work for your listening pleasure at home or in your car.

a little loud but it works fine easy hook up would recomend

I noticed a significant reduction in alternatory noise and whine. The head phones the kids use no longer have irritating back ground noise. Works as described.

It does decrease volume a bit but no more buzzy noise!

I built up a PVR for home use using a PC and a TV tuner card. However I had a lot of noise on the audio (using a newer audio card). I tried this product and it worked very well. The only issue was the output signal was dampened quite a bit - but it is clean.

Worked great for what I needed it for... worked great.