The power amplifier introduced in this article has the greatest advantage of delicate treble, which can reproduce all the subtle sounds of various musical instruments, and has no howling when using a microphone, while the bass is powerful, soothing and deep. The speaker is almost silent during the intervals of the songs. Because it is easy to obtain materials and has good performance, it is more suitable for amateur production.
I believe that most electronics enthusiasts have assembled simple amplifiers using excellent circuits such as TDA2030A and TDA1514. However, even if a high-power BTL circuit is connected to a VCD or a recorder, the speaker still cannot produce enough sound. This is because there is no pre-driver. If there is no pre-driver, the BTL amplifier composed of TDA2030A can only have a power output of about 10W. But after installing the pre-driver, the maximum output power can be fully exerted, and even TDA2030A can output shocking audio power.
Circuit principle:
Component selection and production:
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