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Anonymous users2024-02-10The protection of the car power amplifier is usually the following: Overcurrent protection Car power amplifiers usually have a fuse, and when there is a failure, a large current will be generated, and the fuse will blow to prevent further damage to the power amplifier. This is the same principle as a household device.
Over-temperature protection The car power amplifier will generate heat when it is used, and when it reaches a certain temperature (usually set at about 70-80 degrees), the power amplifier will automatically turn off, and when the temperature drops to a certain level (slightly lower than the temperature protection), it will automatically turn on. Output Short Circuit Protection When the output is short-circuited when installed, the power amplifier enters the protection at the moment of power on. In this case, it is necessary to eliminate the short circuit before normal operation can be resumed.
The power tube in the car amplifier is damaged, such as a short circuit. The amplifier is also automatically protected. According to your situation, if you have just started using it, the red light appears before the amplifier is hot, it should be the output short circuit protection, and the possible reasons are:
1) The output of the power amplifier is short-circuited, and it is necessary to check whether the cable connected to the speaker is short-circuited. (2) The impedance of the horn is less than the nominal impedance of the power amplifier mismatch. For example, the power amplifier is nominally connected to 4 ohms, but it is connected to 2 ohms during the actual installation.
At this time, the output short-circuit protection line is triggered, resulting in automatic protection of the power amplifier. (3) The internal components of the car power amplifier are damaged, especially the power tube. After disassembly, it can be measured and inspected with a multimeter.
4) There are components inside the car power amplifier, short circuit or virtual soldering, which will also lead to automatic protection of the power amplifier from time to time. You can check 1,2 and then 3,4; There is also a situation that is relatively rare, but it is not excluded: when the manufacturer designs the "output short-circuit protection circuit", the component parameter design is more idealistic, but it leads to malfunction in actual use.
The premise is that the impedance of the wiring and horn is correct. You can turn down the volume and experiment to see it. If you don't make it smaller, it's a misoperation.
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Anonymous users2024-02-09**No. a lot, you have tried, there is no problem, my life is crispy in that place, that sorrow, you are all blessed to resurrect the point to watch the TV series, to the present day, what is the situation of the lamp, the next crisp. of diaphoresis
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