I just bought them (89€) and compared with my 50€ Wireless Philips... so dissapointed. With these 449 the high ferquencies hurt my ears, and the techno songs I had on my youtube playlists seem so flat. I try back with the half-of-their-price Philips and the exciting and uplifting sound comes back.   Next workday I'll be returning them.   Update: 1-No amp. Directly plugged to my macbook. That is not important: if my wireless Philips SHC5100/10 almost half-priced sound great in it, these HD449 should too. 2-Mistake? Every model of headphones have...