TL;dr: Color me impressed. I got to hear these as part of the IE600 tour, and they're now on the way to the next listener. Thanks @ericpalonen for the loan. Opinions here are subjective, unvarnished and unquantified. I'm not going to bother with the company, packaging, accessories. I'm pretty sure you've heard of Sennheiser, and there are plenty of photos around. You're certainly not getting these IEMs for the box. Specs from the Sennheiser site: Transducer: Single Dynamic Driver, Pressure Chamber Frequency response: 4-46,500 Hz Sound pressure...