A more Balanced Frequency especially in the Lows and Highs, thus not veiling the Mids as some I.E.M's and headphones can do.With the SM3's you can hear it's 'all there' without any excess on any part of the frequency range .
Out of the I.E.M's I have heard - Westone 3 , CK10's , eq-5's they offer the most precision .In Dance music it's relatively easy to hear when the music isn't being reproduced quite the way it was produced . Too much High's and the all important bass which Good quality Dance music is structured upon sounds weak . Too much Lows and the bass dominates the Rhythm with too much Boom.Too mids and the Kick drums and high Hats etc sound very off .
The SM3's simply accurately reproduce well balanced music , keep it all in it's right perspective .
It's simply just a matter of Balance
fantastic Explanation. This is such an education for me and a humbling one ta boot. My puny little mind was telling me that people into dance music don;t really care too much about tone and sound, as long as the bass kicks. The W3's really shine in Rock and Hard Rock, blues and so on.