FiiO LA-UA1 Noise Isolator

I was getting a faint buzz through my headphones from the laptop's power supply, so I plugged this little adapter in between. It completely cleaned up the noise, and the fact that it's super small and light means it doesn't stick out awkwardly from the port. For the price, this is a straightforward

My laptop's USB ports were introducing a slight buzz into my audio chain, but plugging this tiny adapter in between completely quieted things down. It's impressively small and light, barely adding any bulk to my portable setup.

Tiny and almost weightless, so it disappears into my setup without adding bulk. Plugged it between the source and the amp and the background noise dropped noticeably, just as the noise isolation promises. For the price, it's a clean, simple fix that does exactly what it's supposed to do.