For general indoor home audio playback, playback quality is characterized by soft and delicate appearance, more exquisite and beautiful, playing the sound pressure level is not too high, bear power is relatively small, but also a small range of sound propagation.
The professional audio generally refers to the dance hall, Cara OK hall, theater, conference rooms and stadiums and other professional entertainment, according to different places, the sound of the requirements are different, the size of the venue and other factors, the sound system configuration solutions in different places.
Common home audio system configuration
1, source: the source of the sound, the sound of common home audio systems such as CD, LP, DVD etc..
2, amplification device: in order to effectively launch high-power speaker audio output signal is generally applied to the power amplifier, the common amplification device for AV power amplifier, generally for transistor amplifier, but now some fancier devotion to the electron tube.
3, the sound device: that is, the sound box, its performance will directly affect the sound effect.
4, the connection line: including from the sound source to the power amplifier and the power amplifier to the speaker connector.
Basic requirements for home audio systems
1 requirements for home audio equipment
The ultimate goal of the home audio system is to achieve the desired sound effects, such as at home to enjoy the sound effects of the theater. But the family is different from the theater, so the appreciation of the different nature of the acoustics, acoustics requirements are not the same, for pop music, classical music, light music can correctly restore a variety of musical instruments, but to enjoy the movie, but a sound sense, the requirements of field surrounded by a sense of.
For the sound source, note that the different sound sources will eventually have different sound effects (even if the equipment is exactly the same).
The requirements of the speaker, the power can be smaller, because the family generally do not need to use high-power output, but the sensitivity of the speaker, pointing characteristics, frequency response characteristics should have higher requirements.
Connection line is the most easily overlooked, but it turns out that they can not ignore the impact of sound, its frequency characteristics, shielding characteristics must be better.
2 home audio system requirements for the listening environment
For ordinary families, the living room is the listening room, due to the restrictions of objective conditions, not to listen to the music and the proportion of the environment to make adjustments, but in the size of the existing conditions, how to make the best sound effect is considered: listen to the sound environment of symmetry, the symmetry of including in two aspects, namely audit symmetry and symmetry of acoustic, geometric symmetry and audio settings should be geometrically symmetrical shape. Of course, to listen to the reference point; acoustic symmetry refers to acoustic condition symmetry near the speaker is basically the same, including direct, acoustic reflection and absorption characteristics of the acoustic wave should be consistent, which requires the choice of decoration materials, furniture layout should meet to good acoustic characteristics of sound.
Professional sound reinforcement
General professional sound system configuration
1, sound source (music playback equipment, audio equipment, musical instruments, etc.)
2, control equipment (analog mixer, digital mixer, digital audio media matrix, AV digital management center, the latter two meetings use more)
3, peripheral equipment (processor, equalizer, voltage limiter, frequency divider, actuator, delay, effect, feedback suppressor)
4, restore equipment (speaker system, power amplifier).
5, connecting wire (above equipment by various types of wire, fiber is currently used more and more. )
Professional audio system designed to professional terminology
1, sound pressure level: refers to the actual sound pressure and the reference sound pressure ratio of 20 times the value of the unit is db. It is an important index to measure the sound condition of the sound system and the acoustic quality index.
2 power amplifier: power amplifier is designed to achieve the rated sound pressure level, the sound amplification equipment required power rating. Its unit is tile. It is a direct manifestation of the acoustic parameters in the electroacoustic parameters, and it will be related to the final cost of the project, so it is particularly important.
3: 50 Hz AC hum sound, because the name sounds for low frequency hum with similar power supply ripple coefficient of audio equipment is too large and poor anti-interference performance will lead to hum.
The sound of a sinusoidal signal, especially the sound of a tuning fork, in the sense of sound, as in a tuning fork.
5 intermodulation distortion: intermodulation distortion refers to a two amplitude of a certain proportion (usually 4:1) mixed single audio signal through the playback device to generate a new frequency component of a signal distortion.
6 octave: compared to the frequency of 2 of the frequency range between the sound, a octave between the pitch of the relationship of eight degrees, that is, the frequency of each doubling of the pitch to increase the frequency of one octave of two.
7 frequency divider: a circuit device in the loudspeaker box, which is used to separate the input music signal into different parts, such as treble, tenor, bass, etc..
8 dual amplifier: a connection mode for each speaker unit of a loudspeaker driven by an independent amplifier channel. A pair of two frequency speakers need to use two stereo power amplifier and two pairs of speakers. Double tone".
9 wire division: a way to connect the high and low tones of a musical signal with two sets of speakers. Double tone need to use with two pairs of terminals specially designed speaker.
10 amplifier: preamplifier and power amplifier.
11 Power Amplifier: referred to as a power amplifier, used to enhance the signal power to drive the speaker sound of an electronic device. The power amplifier, which does not have the auxiliary functions such as signal source selection, volume control and so on, is called the second stage.
12 preamplifier: pre amplifier power amplifier and control part, used to enhance the voltage amplitude of the signal, to provide input signal selection, tone adjustment and volume control functions. Pre amplifier.
13 combined amplifier: preamplifier and power amplification in two parts of a chassis amplifier.
14 amps: another version of the electron tube. Professional audio system configuration according to different fields
Greatwall Group administrates GUANGZHOU PRECISE SOUND ELECTRONIC MANUFACTORY and GUANGZHOU ZHUNKUAI HARDWARE MANUFACTORY.It designs, manufactures and sells pro-audio products and hardware products. Our products include professional loudspeakers, line array, power amplifiers, mixers, signal processor, amplifier cases, mixer cases, etc.MORE