The subwoofers in movies are usually exaggerated, which allows us to enhance the presence and vividness when watching movies. Therefore, the subwoofer playback system has become an excellent subwoofer sound effect for home theater systems.
The price of domestically produced active subwoofer speakers is generally above 1200 yuan, and the price of imported products is very expensive. This article introduces a self-made active subwoofer speaker with an output power of 100W and the lowest frequency response. Up to 26HZ, the production cost is about 500 yuan.
Circuit principle:
Component selection and installation:
When the semiconductor diode is turned on, it is equivalent to the switch closing (circuit is turned on), and when it is turned off, it is equivalent to the switch opening (circuit cut), so the diode can be used for switching, and the commonly used model is 1N4148. Since the semiconductor diode has a unidirectional conduction characteristic, the PN junction is turned on under a positive bias, and the resistance in the on state is small, about several tens to several hundreds of ohms; in the reverse bias, it is off. The resistance is very large. Generally, the silicon diode is above 10 Μ Ω, and the bismuth tube is also several tens of kilo ohms to several hundred kilo ohms. With this feature, the diode will act as a control for the current to turn on or off in the circuit, making it an ideal electronic switch.
Switching Diode,1N4148 Signal Diode,4148 Diode,1N4148 Diode
Dongguan Agertech Technology Co., Ltd. , https://www.agertechcomponents.com