The phrase "speaker audio system" refers to a setup that includes speakers which produce sounds from devices like TVs, radios, or music players. Full definition
The standard six - speaker audio system features a good array of sources, but poor sound quality. (cnet.com)
The six - speaker audio system in the car initially sounded about average. (cnet.com)
Inside, both vehicles come with adjustable head restraints, air conditioning, cruise control and a six - speaker audio system as standard. (autoexpress.co.uk)