The role of the power amplifier in the sound system.Campus outdoor audio sales

　　In the field of multimedia speakers, the concept of independent power amplifier first appeared in 2002. After a period of market cultivation, around 2005 and 2006, this new design idea of multimedia speakers has been widely recognized by consumers. Large speaker manufacturers have also introduced new 2.1 speakers designed with independent power amplifiers, which has set off a wave of "independent power amplifiers" panic buying. In fact, from the perspective of speaker sound quality, the design of independent power amplifiers will not be greatly improved. Independent power amplifiers can only effectively reduce the impact of electromagnetic interference on sound quality, and are not enough to cause a considerable improvement in sound quality. Nevertheless, the independent power amplifier design still has many advantages that ordinary 2.1 multimedia speakers do not have:

　　The role of the power amplifier in the sound system

　　First of all, the independent power amplifier has no built-in volume limit, so it can achieve better heat dissipation. Ordinary speakers with built-in power amplifiers can only dissipate heat through the convection of the inverter tube because they are sealed in a wooden box with poor thermal conductivity. For independent power amplifiers, although the power amplifier circuit is also sealed in the box, because the power amplifier box is not like a speaker, there is no sealing requirement, so a large number of heat dissipation holes can be opened in the position of the heating component, so that the heat can pass through natural convection. Disperse quickly. This is especially important for high-power amplifiers.

　　Secondly, from the aspect of power amplifier, independent power amplifier is beneficial to circuit design. For ordinary speakers, due to many factors such as volume and stability, the circuit design is very compact, and it is difficult to achieve an optimized circuit layout. The independent power amplifier, because it has an independent power amplifier box, has sufficient space, so the circuit design can proceed from the needs of electrical design without being interfered by objective factors. The independent power amplifier is beneficial to the stable performance of the circuit.

　　The role of the power amplifier in the sound system

　　Thirdly, for speakers with built-in power amplifiers, the air in the box is constantly vibrating, causing the PCB board and electronic components of the power amplifier to resonate, and the vibration of capacitors and other components will be played back into the sound, resulting in noise. In addition, the speaker will also produce electromagnetic effects, even if it is a fully anti-magnetic speaker, there will be unavoidable magnetic leakage, especially the huge woofer. The influence of magnetic leakage from the sale of electronic components such as circuit boards, ICs, etc., will interfere with the current in the circuit, resulting in interfering current noise.

　　In addition, the speaker with independent power amplifier design uses the power amplifier cabinet control method, which greatly liberates the placement of the subwoofer and saves valuable desktop space.

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