Complex sentence: Fibre optic starfields were fitted in the foyer ceiling and above the screen, and a THX-certified JBL sound system was installed; the THX certification would later be dropped and Martin Audio speakers were installed.
Split into simpler sentences: Fibre optic starfields were fitted in the foyer ceiling and above the screen, and a THX-certified JBL sound system was installed. The THX certification would later be dropped and Martin Audio speakers were installed.