The main difference between active audio and passive audio is whether there is an audio power amplifier in the speaker. As mentioned in the previous case of professional sound reinforcement system, the sound with power amplifier is called active sound, and the sound without audio power amplifier is passive sound. In fact, passive sound is a simple speaker.
Most of the active speakers are for computer multimedia, and the power is not very large, so they all have built-in amplifiers. Of course, the sound quality is also poor.
Active audio is often used in computer and cable broadcasting, as long as the system gives it a sound signal, it can make it sound. But its sound quality is limited by the sound signal source. In addition, its power is also small, which is limited to family and personal use.
Passive speakers are generally used in home theater, hifi speakers and karaoke. They need power amplifier and signal source (VCD, DVD, CD) to drive together, so the sound quality is better.
Passive audio is often used in large-scale amplifying, such as large venues, conference rooms, movies, theaters and home theaters. It needs a large power to drive and has good sound quality.