Closed headphones, look rather plastic, it is not in the great headphone it is clear, but for the price it's okay ...
I also have a K240 Monitor from the same brand that is far better, but semi open.
Race Results for recording voice, I prefer the K55 because I have less repisse. Then the bulk in this case is that the singer or the singer get along in order to be placed correctly. And honestly in this case, no one has ever made me focus on a particular frequency returned to its bad taste in the headphone!
In short, it will be changed from a K271 or will not be changed ....