Cardas: Best Buds Forever?

Cardas is best known for bleeding-edge cables but is moving into earbuds with the EM 5813 Ear Speakers. Their heavy and lustrous metal casings are brass in the $425 model and steel in the $325 model. Despite their weight, they fit well and don't fall out easily if you pick the right cushion size (took me a couple of tries). Cardas went to a lot of trouble to make the tube mimic the shape of the cochlea, in proportions that adhere to the Golden Ratio, a longtime Cardas design obsession. (It seems to have resulted in a long string of great-sounding products.) The diaphragm is about the size of the eardrum.