( sound systems)
A sound system is a set of equipment for playing recorded music, or for making a band’s music able to be heard by everyone at a concert.
N-COUNT
( sound systems)
A sound system is a set of equipment for playing recorded music, or for making a band’s music able to be heard by everyone at a concert.
N-COUNT
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006