Pros: Crazy good sound! Great price!
Cons: They don't look as great as some headphones, I would prefer it if they didn`t have any noise cancellation (100% open)
Frequency range: 5Hz - 30kHz
Impedance: 32 Ohms
THD (total harmonic distortion): 0.05%
Sensitivity: 105 dB
noise cancellation: 10dB
I bought these headphones for 200$ (they retail for 250) and I love them! I listen to heavy bass music (mostly dubstep) and these headphones handle it no problem. I'm not sure if I would recommend these headphones to someone who doesn't like to have a good amount of bass in their music.
I use them with a Fiio E7 amp (minijack to ipod doc to bypass ipod amp) though it is not absolutely necessary and an iPhone.
I recommend them!