Just to clear up any confusion, DD and AQ are two seperate companies not affiliated at all. The motors are not the same, and the soft parts are not interchangeable. They used to share some warehouse storage space, but that's about it.Same here lol. I owned a pair of DD's and they sounded fine, and they are notorious for having that sound as well. Kind of expected seeing as how AQ and DD are sister companies though. I'm curious what the hollow sound is supposed to be lol..