The active integrated speaker is the stereo Suzhou and the power supply are all installed in one speaker, and the active speaker is connected with another passive speaker to achieve stereo playback. It has the advantages of easy to use, low system loss, and small footprint. The active speakers introduced in this article are carefully selected from the circuit design to the selection of speakers and components. In order to achieve less investment, good effect, and not to pursue a flashy pursuit, it strives to achieve the best coordination of each part, and its cost is only equivalent to a pair of ordinary passive speakers commercially available. With the development of electro-acoustic technology, it is no longer difficult for audio enthusiasts to assemble a pair of HI-FI active speakers by themselves. By assembling by themselves, a comprehensive understanding of the overall structure is also an interesting thing. In this regard, the speakers can be flexibly connected to a variety of audio sources for playback, such as VCD players, CD players, multimedia computers, walkmans, tape recorders, recorders, televisions, and karaoke. Use in rooms of 15-25 square meters. Let you get a satisfactory listening effect, now introduce the reader.
Circuit principle:
The circuit principle of the pre-amplifier circuit, power amplifier and power supply part is shown in Figure 9-71. Each channel of the pre-stage is composed of the NE5532, the king of the two-pole op amp. The first stage is an in-phase amplifier, which has a very high Input impedance and extremely low output impedance,
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