The Monster Beats HD defy simple categorization. they are not actually closed headphones,beats by monster, they are not in the audio tracks cancel the reality they are really like any other Dr. Dre Monster headphones we've tested. What they are is quite impressive and fun ... if we had a school for this, they would be the best of what list.Right short distance from the bat we will accept the audio Beats experienced relatively poor efficiency for cancellation in the direction of other people looked on this article but granted that their bass is so tight and poppin ',beats dr dre, and so strong that the high does not seem to be as? a. However,monster beats, the Beats had the poorest insulation near the lot.