After only a few hours of listening all kinds of music with these intras, it is clear that we are dealing with very good material. The value for money is amazing as reported by other testimony. Owner of Q-jays ITE and headphones monster beat studio, I can say that we are in the same category with the S4. Deeper bass than the Q-jays while the mids and the highs are a little less detailed. The whole being to find the right silicones so that listening is watertight and that the return of the grave is optimal. But be careful listen to songs which encoding is good because otherwise you lose the advantage of such material. Good listening on S4.
