1. Classified by usage
(1) Portable mixer
The portable mixer has 2-4 channels, and the stage is equipped with a simple high and low frequency compensator with input, output and hybrid circuits. It is mostly used for sound reinforcement or live recording. The advantage is that it is easy to carry and easy to operate.
(2) Semi-mobile mixer
The semi-mobile mixer has 4-6 channels, the stage is equipped with high, medium and low frequency compensators, and some are equipped with high and low pass filters and automatic volume control. The output circuits are mostly two channels. Mainly used for language recording, the film factory uses the most.
(3) Fixed mixer
There are two types of fixed mixers: large and medium. Large mixers have more than 24 channels and even hundreds of channels. Medium-sized mixers usually have 12-24 channels. They are fully functional and equipped with reverberators and pressure limiting. It is mostly used in radio, film studios, audio-visual production departments, etc. It can record music, mix recordings, output channels, and multi-track recorders for multi-channel recording. In large theaters and concert halls, fixed mixers are also used for sound reinforcement.
2. Classified by structure
(1) Integrated mixer
Combine the functions of a mixer, power amplifier, graphic equalizer and effects in one chassis, and install the basic classification of the mixer in a chassis. The appearance basically keeps the style of the mixer unchanged. This console is sometimes referred to as a "four-in-one" console. This type of mixer has a low output power (generally no more than 2X250W) and is easy to operate, especially suitable for fluid performances.
(2) Non-integrated mixer
The most notable feature is the absence of a power amplifier
3. Classified by purpose
(1) Recording console
There are extremely high technical indicators, extremely complete and rich functions, and some computer control functions or configuration of optional computer systems, which is the highest grade in the mixer. It is used in recording studios of radio, television, film studios and record companies for high-quality multi-track recording.
(2) Sound amplification mixer
After adjusting the respective influence levels, frequency compensation, effect configuration, and sound image localization, each sound source is mixed into a set of stereo signals and sent to the power amplifier for sound amplification. For stage performances, broadcasts, etc., higher-end can also be used in the studio.
(3) Disco mixer (DJ mixer)
This is a dedicated small mixer with the special features:
A. DJ mixers are usually smaller, no more than eight, but each is stereo input.
B. With a control switch that can easily switch the sound source, a "cross-fader" that moves left and right, commonly known as a horizontal fader. The cross fader controls the two sets of stereo signals in a reverse crossover. When the fader is pushed to the leftmost side, the first set of stereo signals is the strongest, the second set of attenuation is ∞, completely silent; as the fader shifts to the right, the first set of stereo signals is gradually reduced, and the second level of stereo signals is constantly Enhanced; when reaching the far right, the first set of stereo signals is fully attenuated and the second stage stereo signal is strongest. With the horizontal fader, the continuous switching of the two sound sources without traces is realized.
C. DJ mixer has at least two turntable input ports to accept the signals from two stereo turntables. The RIAA equalization network required for the corresponding headphone amplifier (RIAA) and electromagnetic pickup, while the ordinary mixer cannot directly accept the signal of the electrophone of the electromagnetic pickup.
4. According to signal processing methods
(1) Digital mixer
The audio signal in the mixer is a digital signal that can be easily fully automated with low total harmonic distortion and equivalent input noise. It is often used in demanding audio systems.
(2) Analog mixer
Signal processing is carried out using traditional analog methods, with mature technology and low cost.
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