I think the problem is that evolution infers that it is the similar but better. HE-500 may be based on the HE-6, but it is more of a de-evolution. Cheapen all possible components to get the lowest price point while retaining the highest sound quality possible. This is more accurately described as filter-down technology, where the 'statement' product is built, then the technology is made efficient to produce a product that can actually be afforded (in many cases statement products are not actually viable for the marketplace) while retaining most of the advantages of the breakthrough design. This is in evidence everywhere from F1 cars and passenger cars to exotic CPUs and family laptops.