1. Introduction to speakers

Speaker refers to a device that can convert audio signals into sound. In layman’s terms, it refers to the built-in power amplifier in the main speaker cabinet or the subwoofer cabinet. After the audio signal is amplified and processed, the speaker itself plays back the sound to make it sound. Get bigger.

The speaker is the terminal of the entire sound system. Its function is to convert audio energy into corresponding sound energy and radiate it to the space. It is an extremely important part of the sound system and is responsible for converting electrical signals into acoustic signals for people. The task of listening directly to the ears.

The composition of the speaker:

The speakers on the market come in all shapes and colors, but no matter which one is, they are composed of two basic parts: the speaker unit (called Yangsheng unit) and the cabinet. In addition, most speakers use at least two or two Only the above speaker units implement the so-called multi-channel sound reproduction, so the crossover is also an indispensable part. Of course, there may also be sound-absorbing cotton, inverted tubes, folded “labyrinth pipes”, and reinforced speakers. Ribs/reinforced sound insulation boards and other components, but these components are not indispensable for any speaker. The most basic components of a speaker are only three parts: speaker unit, cabinet and crossover.

Classification of speakers:

The classification of speakers has different angles and standards. According to the acoustic structure of the speakers, there are airtight boxes, inverted boxes (also called low frequency reflection boxes), passive radiator speakers, and transmission line speakers. The inverter box is the mainstream of the current market; from the perspective of the size and placement of the speakers, there are floor-standing boxes and bookshelf boxes. The former is relatively large in size and usually placed directly on the ground. Sometimes, shock-absorbing feet are also installed under the speakers. . Due to the large volume of the cabinet and the convenience of using larger and more woofers, the floor-to-ceiling box usually has better low frequency, higher output sound pressure level and strong power carrying capacity, so it is suitable for larger listening areas or more comprehensive requirements The bookshelf box is small in size and usually placed on a tripod. It is characterized by flexible placement and does not occupy space. However, due to the volume of the box and the limitation of the diameter and number of woofers, its low frequency is usually lower than that of a floor box, and its carrying power And the output sound pressure level is also smaller, which is suitable for use in a smaller listening environment; according to the narrow bandwidth of the playback, there are broadband speakers and narrowband speakers. Most speakers are designed to cover The frequency band as wide as possible is a wide-band speaker. The most common type of narrow-band speakers is the subwoofer (subwoofer) that emerged with the home theater, which is only used to restore the ultra-low frequency to a very narrow frequency band; according to whether there is a built-in power amplifier, it can be divided into passive speakers and Active speakers, the former does not have a built-in amplifier and the latter has. At present, most home speakers are passive, but subwoofers are usually active.

2. Introduction to Audio

Sound refers to sounds other than human language and music, including sounds of natural environment, sounds of animals, sounds of machines and tools, and various sounds made by human actions. Audio probably includes a power amplifier, peripheral equipment (including compressor, effector, equalizer, VCD, DVD, etc.), speakers (speakers, speakers), mixer, microphone, display equipment, etc. add up to a set. Among them, speakers are sound output devices, speakers, subwoofers, and so on. A speaker includes three loudspeakers, high, low, and medium, three but not necessarily three. The development history of technology can be divided into four stages: electron tubes, transistors, integrated circuits, and field effect transistors.

Audio components:

Audio equipment probably includes power amplifiers, peripheral equipment (including compressors, effects, equalizers, exciters, etc.), speakers (speakers, speakers), mixers, sound sources (such as microphones, musical instruments, VCD, DVD) display devices And so on, add up to one set. Among them, speakers are sound output devices, speakers, subwoofers, etc. A speaker includes three types of speakers, high, low, and medium, but not necessarily three.