Compared to the in-ear headphones while beats studio actives noise-canceling headphones in greater volume, but it still did not provide better noise reduction. As is well known, dynamic audio units in the process to try and bring in more air vibration pronunciation, so they can produce more bass.
More means more powerful low-frequency air vibration, we "feel" to not hear often is more "cheap" low frequency. Moving-coil unit the biggest drawback is that the volume is too large. Treble not enough transparent accents Beats By Dre Pro are more turbid, or the heavy bass sound-performance at the expense of some of the high school of expression, midrange and treble performance but it is not for nothing. Sense of music and crisp treble float is General.
Universal ear sets, such as ETYMOTIC's Beats Solo HD three sets and two sets, they can let users choose depth of the plugged ear road, usually inserted deep in order to strengthen the effectiveness of (also in this way are considered to be "foreign bodies" strong wear).