Hey guys, im currently having a bit of trouble with my Sennheiser HD 555 headphones. I used to own an Asus Pro50n Notebook computer, and the headphones worked fine on it, no troubles at all. I recently bought an Asus n53jq series notebook computer, and whenever i plug the HD 555s in the sound is really weird, like its muffled, tinny, and some parts missing from the sound. The HD 555s work fine on my iPod. I also have sennheiser cx300 canalphones and they work fine on my new notebook. Any ideas why the HD 555s are playing up? Thanks in advance.