Who owns the Advent brand these days? Did Labtec buy them out, or Logitech, or what? (Or did Labtec buy Advent, and Logitech bought Labtec? I Forget.)
I have a pair of older sets of Advent multimedia speakers, ones with a triangular shape, and dual 2" and 3" cones in each unit. For the price, they are one of the best-sounding sets of speakers that I've ever had hooked up to my computer. I remember seeing the exact same model being used at tradeshow conventions, back in the day, so if they were being used for professional exhibit applications, then you know that they were pretty good. That was back when Bungie introduced their first FPS for 68K color Macs, at Macworld Boston.
I know nothing about their headphones, or who even makes them these days.