Tai nghe DT 990 Pro (250 ohms)

Professional acoustically open headphone for monitoring and studio applications.

Future Music magazine, September 2010: 
Beyerdynamic are no strangers to the professional audio scene, so you’d be forgiven for expecting a lot from these cans. The DT990 Pros are open-backed, meaning they leak sound quite a bit, but they make up for it in their incredible stereo detail as well as their crisp and tight mid and high response. They are bright but not harsh, thick but not cloudy, warm but also sincere, and in terms of comfort they are a joy to wear for long periods... 

Verdict 
For: Beautifully crisp mid- and high-end range 
with fantastic stereo representation 
Against: Open back means sound leakage 
and not a huge amount of sub-bass