Last time I used it just made static noises, re plugged it in and it completely stopped working.

Additionally, I've found that it serves surprisingly well to remove the static/hissing/noise that bad on-board sound cards tends to produce

If you're like me, you use your fancy expensive noise-canceling headphones at work to block out distractions.

I hooked the Koss volume control between my computer and speaker and speakers are great with no extraneous noise.

Some static noise when adjusting the volume.

Works beautifully; no noise and the volume is sufficient

The Koss VC20 Volume Control works as intended however, it will eventually start making static noise when you are turning the volume up and down

I primarily bought it to remove the hissing noise that I heard from my headphones

Excellent adjuster, it got rid of the annoying back noise from my pc (motherboard grounding)

If you're like me, you use your fancy expensive noise-canceling headphones at work to block out distractions.

The resistor in this volume control wears out makes static noise after only a few months

Works beautifully; no noise and the volume is sufficient

I have nice noise-cancelling headphones that I use with this item and can not tell any audio distortion or loss of quality by having them plugged into this as opposed to being plugged straight into the speaker.

The volume control is smooth and noise-free, smoothly adjusting the volume from zero to full with one rotation of the compact dial inset into the mechanism.

I bought this with a specific use in mind: to use it with an old but good n' comfy Sony MDR-A34 vertical in-ear short cord headphones and my trusted Sandisk Sansa Clip Zip playing flac files