First, according to the classification of responsibilities-can be divided into main speakers, center speakers and surround speakers.
1. Main speaker: The main speaker is the mainstay of the home KTV sound system. The sound and music accompanying the video picture are all emitted from the main speaker, which can show the shocking sound effect of the movie.
2. Center speaker: The center speaker usually has only one speaker, which is mainly responsible for the dialogue of all the main sounds in the movie.
3. Surrounding speakers: The number of surrounding speakers depends on different situations. Generally, a 5. 1 channel home theater needs 2 surround speakers, and a 7. 1 channel needs 4 surround speakers. With the development of technology, more may be needed. The surrounding speakers will create a sense of sound encirclement, which will make people who watch movies feel that they are in the movie and have a more real experience. Because of the different responsibilities of each speaker, their placement is also very important, so pay attention to the correct placement when using.
4, subwoofer: subwoofer is mainly responsible for the subwoofer channel, generally below 200HZ, this low-frequency sound is between sound and airflow, so that you can feel the roar and feel the wind-like airflow. The function of the subwoofer is to create a large-scale sound effect similar to an explosion in the film.
Second, according to the presence or absence of power amplifiers, they can be divided into active speakers and passive speakers.
1. Active speakers: Active speakers include multimedia computer speakers, active ultra-low speakers and some new home theater active speakers with power amplifiers. There are also some professional recording and monitoring speakers with built-in power amplifier circuits and electronic frequency divider speakers with built-in electronic frequency divider circuits and amplifiers, which also belong to active speakers. When using an active speaker, you don't have to consider the matching problem with the power amplifier, because the built-in power amplifier circuit is also convenient for direct driving with low-level audio signals. Active speakers are usually marked with the output power, input impedance and input signal level of the built-in amplifier. Active ultra-low speakers are also marked with parameters such as frequency characteristics of input signals and characteristics of low-pass filters.
2. Passive speakers: Passive speakers refer to ordinary KTV speakers without power amplifier inside. Although there is no amplifier, passive speakers usually have a frequency division network and an impedance compensation circuit. Passive speakers are generally marked with parameters such as impedance, power and frequency range.
Third, according to the audio classification-can be divided into full-band speakers, woofers and subwoofers.
1. Full-band speaker: A speaker that can play in the middle, high and low frequency range is a full-band speaker. The lower frequency is generally 30Hz-60Hz, and the upper frequency is 15KHz-20KHz. Generally, only one or two pairs of full-band speakers are needed for KTV sound system in small and medium-sized families.
2. Bass speakers and subwoofers: The role of bass speakers and subwoofers is to supplement the low-frequency and ultra-low-frequency playback of full-band speakers. Generally, these two kinds of speakers will be used in large and medium-sized audio systems to enhance the intensity and shock of low-frequency playback.