Pros: Light weight (compared with previous, with batteries).
Cons: High frequency/ techno vocals hurt my ears; flat/unexciting sound (missing low and mid-range?)
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.
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 good and bad opinions, depending of the person likes and the type of music. In the shops of your city you have an isolated cabin to try the products? Great for you.
3-why roll eyes when talking about youtube playlists? I listen to the songs I like and they sound different (worse).
I am doing a moderate "break-in" as I've read in some webs (moderate volume, differents music styles, silences). If it's true, nice; if not, I lose nothing trying it, so don't blame on it.
I have found a single song that sounds great with the Philips, and when I put the 449 I find that clearly sounds worse, and the vocals and high instruments hurt my ears (yes, real). Seems that I'm not the only one with this issue with Senn HD4XX. If that does not improve in 10 days I'll return (or exchange).
Update for bonami2:
"Good headphone will make youtube sound crap lol it compressed to death" --> and how does the compression make the simpler Philips sound great? Come on, man.
Also, my ears hurs after some hours; I imagine the cushion/foam needs to adapt.
Last update: finally I got Sony MDR-V55 after trying some at the audio store. That is music!!!