Complex sentence: Onix Audio was a UK based manufacturer of high end electronic audio equipment from 1984 to 1990 producing a range of Hi fidelity amplifiers, tuners and accessories that were exported to 28 countries.
Split into simpler sentences: Onix Audio was a UK based manufacturer of high end electronic audio equipment from 1984 to 1990. During this time Onix Audio produced a range of Hi fidelity amplifiers, tuners and accessories that were exported to 28 countries.