Complex sentence: Onix Audio's products were known for their longevity and excellence in delivering a sense of power, rhythmic drive, clearly defined sound quality, as well as adding an authoritative body and weight to music.
Split into simpler sentences: Onix Audio's products became known for their longevity and excellence in construction, with an ability to deliver a sense of power and rhythmic drive along with clearly defined sound quality. Furthermore adding an authoritative body and weight to music.