Complex sentence: Although most of their products are aimed at professionals, they do have a highly successful line of in-ear "canalphones" for consumers, the most well-known of which being their low-end ER-6 Isolator earphones.
Split into simpler sentences: Although most of their products are aimed at professionals, they do have a highly successful line of in-ear "canalphones" for consumers. The most well-known of which being their low-end ER-6 Isolator earphones.