Thought I would add I purchased a desktop AMP/DAC from Headroom to drive these headphones. I use them at work and my computer cannot drive them on its own. These are the first high end phones I have ever had so I cannot contrast and compare with others of the same caliber. But I can say they are very clean, clear, and you hear everything without one range overwhelming the others. You also hear old music as if for the first time. I honestly have trouble staying focused on work at times because of the wow factor. And they are still not broken in yet!