My thoughts on the Sennheiser 558   First, off, I would like to begin with the standard "I am not an audiophile" disclaimer.   The package came from Dahmart and on time - within 2 days of ordering with expedited shipping. The headphones were in mint condition but without the box. As I looked at them it became increasingly harder not to plug them in, and so I did. Thus starting my first lesson in "enthusiast grade" headphones. In the coming week I would learn a lot about the headphones I had ordered, sound signatures, and the kind of sound I...