Selection and use of speakers

The speakers of the model are many, the performance parameters, the size of the diameter, the use range of different. Selection should be according to the specific conditions of use, can not blindly pursue high power, large caliber and other content. And to be based on the occasion, the use of the purpose of a reasonable choice of speakers.
   
　　(1)The impedance of the speaker and the impedance of the amplifier is to be matched to the   the speaker must ensure that the output impedance of the amplifier is equal to the output impedance of the amplifier. So select the speaker, should be based on the impedance of the power amplifier. If the impedance of a speaker can not meet the requirements of the impedance of the amplifier, more than two speakers can be selected for the series and parallel connection. If the output of the power amplifier for power output can not consider the matching problem.
   
　　(2)The speaker's power should be adapted to the   the rated power of the speaker is selected, and the power amplifier is used to meet the requirements of the same impedance matching. The speaker's impedance and output impedance of the amplifier and the output power of the amplifier should be matched at the same time.
   
　　(3)The frequency characteristics of the loudspeaker selection & nbsp; in order to get good sound, to complete the full range using just one speaker playback is not possible. Therefore, choosing a speaker can according to the frequency characteristics of the speakers, the choice of frequency (2~2OkHz), intermediate frequency (5OOHz~ 5 kHz) frequency and low-frequency 2OHz~3kHz speaker with the use of.

　　If you want to get rich bass, try to choose a large caliber speakers. It can also use the rubber side speakers, which increase the flexibility of the vibration system, so that the low frequency characteristics of high.
　　As for theater, a stadium, a large hall selected speaker, choose a professional with high frequency horn loudspeaker and phase inverted type loudspeaker. All kinds of speakers, due to the different materials and shapes of the vibration system, have a direct impact on the color of the sound, so the choice of the color of the speakers can be selected. The soft and warm of the music can be expressed by the soft ball and the cone basin. While the hard sphere type top can express the music and the rhythm and intensity of crisp.
    
　　(4)Method for choosing the speakers
   
　　1)The purchase of speaker, first of all to view itself speaker trademark label nominal impedance and the rated power is what you need; and then the appearance identification, observe the loudspeaker leads is intact, a paper cone is damaged, broken, glue pot racks connected is solid.
  
　　2)Check the speaker, available with both hands evenly gently downward press paper cone, seriously listen voice coil and iron core rub friction sound. The paper pots do not overexert, so as not to damage the cone.
  
　　 3)When the content of examination requirements can audition examination. The speaker pickup impedance and power conform to the requirements of the power amplifier circuit, listen to listen to the speaker sends out the voice is hoarse, harsh, there should be no voice, a good speaker sound should be level, full, harmonious, clear and pleasant to the ear, a sense of comfort. In the audition examination the best selection of their familiar music.
   
　　(5)The use of the speaker notes.
   
　　1)When using the loudspeaker should avoid the fall, the collision, such may protect the good vibration system the correct installation position, does not cause the distortion and the damage.
   
　　2)Speakers should pay attention to moisture, due to the sound of the speaker's voice coil will be dry after moisture or short circuit. Paper basin will be deformed after moisture.
   
　　3)Plus the power of the speaker can not exceed its nominal value, otherwise it will be damaged.