扩声音响系统又称专业音响系统。社会上有一种误解，认为扩声系统非常简单，只要把话筒(及其他声源)、调音台、功放和扬声器箱连接在一起就能组成一项扩声工程。这种理解造成许多业主投入了不少资金，可得到的语言扩声效果却是声音模糊不清，反馈啸叫的干扰使声音无法开大，音乐重放时音质变调听之无味。
Sound reinforcement system is also called professional sound system. There is a misunderstanding in the society that the sound reinforcement system is very simple. As long as the microphone (and other sound sources), mixer, power amplifier and loudspeaker box are connected together, a sound reinforcement project can be formed. This kind of understanding causes many owners to invest a lot of money, but the effect of language sound reinforcement is ambiguous, the interference of feedback howl makes the sound unable to turn up, and the tone quality is changed when the music is replayed, which is tasteless.
扩声系统是一项系统工程，涉及电子技术、电声技术、建声技术和声学艺术等多种学科，同时还须与视频系统(多媒体投影和摄像系统)、舞台或舞厅灯光系统、消防广播系统、寻呼广播系统和安保系统等子系统的密切配合和协调。扩声系统的音响效果不仅与电声系统的综合性能有关，还与声音的传播环境——建筑声学和现场调音使用密切相关。扩声系统的使用功能和音响效果涉及正确合理的电声系统设计和调试、良好的声音传播条件和正确的现场调音技术三者最佳的配合。电声系统犹如公路上行驶的汽车，建声条件犹如公路，调音师犹如汽车司机。如果说汽车的性能是安全快速行驶的必要条件，那么公路路面的质量是平衡、快速行驶的重要基础，汽车司机的驾驶技术和经验是确保安全行驶的基本保证。三者相辅相成，缺一不可。
Sound reinforcement system is a system engineering, involving electronic technology, electroacoustic technology, sound building technology, acoustic art and other disciplines. At the same time, it also needs close cooperation and coordination with video system (multimedia projection and camera system), stage or ballroom lighting system, fire broadcast system, paging broadcast system, security system and other subsystems. The sound effect of sound reinforcement system is not only related to the comprehensive performance of electroacoustic system, but also closely related to the sound transmission environment architectural acoustics and on-site tuning. The use function and sound effect of sound reinforcement system involve the best combination of correct and reasonable design and debugging of electroacoustic system, good sound transmission conditions and correct on-site tuning technology. The electroacoustic system is like a car on the road, the sound condition is like a road, and the tuner is like a car driver. If the performance of the car is a necessary condition for safe and fast driving, then the quality of the road surface is an important basis for balanced and fast driving, and the driving technology and experience of the car driver is the basic guarantee for safe driving. The three complement each other and are indispensable.