I'm confused which is better between this?
http://www.p4c.philips.com/files/s/shp9000_00/shp9000_00_pss_eng.pdf
http://reviews.cnet.com/headphones/denon-ah-d2000/4507-7877_7-32340590.html
and for beats i can't find anything specifications.
Philips headphones is only for 250$, have a detachable cable and so big frequency response: 5 - 40,000 Hz, big speaker diameter 50mm.
Denon have little more big frequency response, but the cable is so thin. And i want durable headphones with more than good sound, but I don't have more than 400$.
Beats by dr.dre have a good cable and only for that I add then to the list, never wrote any information on them and praise them a lot, so I decided to consult.
I am far from expert, but my favorite pastime is to listen music while work (6-12 hours per day).
What is different between Impedance: 32/24/40 ohm? What is butter?
In short I want headphones with most pure and accurate sound with good durability
Thanks for all, big apologies for my bad english.














