There's only a handful of companies creating BA drivers. Sonion Knowles Molex Bellsing and supposedly sony creates(used to create) some And probably some

There's only a handful of companies creating BA drivers. Sonion Knowles Molex Bellsing and supposedly sony creates(used to create) some And probably some others I don't know about. Some of them cost that much yeah, but not all of them. Nowadays you can get 10BA(though it's more likely 5 doubles each side from china for $600). There are a few exceptions like noble audio that are premium priced with custom units, but most people use factory devices. You can get 3 BA sub 100 iems on aliexpress. Are they good? sometimes, but the point is I would say there's an audio revolution going on that is hardly noticeable unless you're actively watching it.