中小型摇滚乐声系统,包括舞台“返送”和“主扩声”两大系统。前者是专门针对演员和乐队的供声系统,通常对声音不做任何修饰,允许对声场均衡和添加效果。后者是专门针对观众席听众的送声系统,允许对声音进行艺术加工、润色修饰和均衡,观众厅内的声音,要反映出舞台声源的位置,即 Small and medium-sized rock music system, including the stage “return” and “main PA” two systems. The former is a sound system specifically for actors and bands, usually without any modification to the sound, allowing the sound field to be balanced and added. The latter is specifically designed for the auditorium audience to send the sound system, allowing the art of sound processing, retouching and equalization, auditorium sound, to reflect the stage sound source position, that is