Professional audio equipment consists of a monitoring and mixing console; Power amplifier mixing console; Portable mixing console; Power amplifier; Dynamic microphone; Condenser microphone; Wireless microphone; Speaker; Monitor the speaker; Power amplifier speaker; Subwoofer; Equalizer; Reverberator; Effector; Delayer; Compressor; Limiter; Splitter; Noise gate; Laser player; Recording card holder; DVD player; Projector; Variable frequency regulator; Song request device; Composed of numerous devices such as headphones.
There are various types of speakers: according to their energy conversion methods, they can be divided into electric, electromagnetic, piezoelectric, digital, and other types; According to the diaphragm structure, it can be divided into various types such as single paper bowl, composite paper bowl, composite horn, coaxial, etc; According to the beginning of the diaphragm, it can be divided into various types, such as cone cone type, spherical top type, flat plate type, belt type, etc; According to the playback frequency, it can be divided into high frequency, medium frequency, low frequency, and full band speakers; According to the magnetic circuit form, it can be divided into various types such as external magnetic, internal magnetic, dual magnetic circuit, and shielded; According to magnetic circuit properties, it can be divided into ferrite magnets, neodymium boron magnets, and aluminum nickel cobalt magnet speakers; According to the diaphragm material, it can be divided into paper and non paper basin speakers, etc.
The box is used to eliminate the sound short circuit of the speaker unit, suppress its sound resonance, expand its frequency response range, and reduce distortion. The external structure of the speaker box can be divided into bookshelf type and floor type, as well as vertical and horizontal types. The internal structure of the box can be in various forms, including enclosed, inverted, bandpass, empty paper basin, maze, symmetrical drive, and horn. The most commonly used are enclosed, inverted, and bandpass.
Frequency dividers have the difference between power dividers and electronic dividers, both of which are mainly used for frequency band division, amplitude frequency and phase frequency characteristic correction, impedance compensation and attenuation, etc. A power divider, also known as a passive post stage divider, divides frequencies after the power amplifier. It mainly consists of passive components such as inductors, resistors, and capacitors to form a filter network, which sends audio signals from each frequency band to the corresponding frequency band speakers for playback. Its characteristics are low cost, simple structure, suitable for amateur work, but its disadvantages are high insertion loss, low efficiency, and poor transient characteristics.