Review on 🔌 StarTech.com 1m Up Angled Mini USB Cable Cord - A to Mini B - USB A (M) to USB Mini B (M) - Black (USBAMB1MU) by Isaac Maze

This is an inexpensive way to dramatically improve the sound of any setup. Available in a variety of sizes so you can attach them directly over speaker wire and/or power cords. If you're having trouble with feedback or buzzing, be sure to try this inexpensive option first before taking more drastic action.