sorry for this generic question if this has been covered before.
i was wondering, aside from the single cord on the d66 (double cord for the d22) and the colors, what else are the differences between these two models, especially on the sound quality. i have seen that the price gap between the two is so big.
i'm about to get my d22 pair for my portables coz this is the only one available in this place. if i'll get the d66, i have to go online. is it worth the upgrade? i won't be using an amp with em.