After buying a Cowon J3 and re-encoded my favorite titles (since my CD) en Flac, I used my Monster Jamz ... and enchantment ... But I had a crush for Shure SE 425 I have long dreamed. Compared to my Monster, my first experience was disappointing. Flat, dull, without any soul. And then ... I set my equalize and I put on the setting "Blues" ... Wow !!! ... I had never heard such power, as clearly !! but the bass was a little too deep and tiring after a while. After a bit of patience and my own settings, I now take an incredible pleasure, without fatigue. A pure, deep bass without more, in short, the pleasure of such music as I discover like never before! Bach, Beethoven, Angra, Julien Clerc, Joe Cocker, Deep Purple ... what a joy! Shure render with fidelity and richness indescribable quality of music that your device provides. My old Monster are a class below. I let you discover if, like me, you want to skip the MP3 of "real music". Finally, the insulation is exceptional and unparalleled mantien (foam tips). By cons, we'll see longevity, even if the material seems sturdy.