php editor Banana will answer your questions about amplifier and motherboard selection. Choosing a suitable amplifier motherboard is an important part of building a sound system. First, consider the power output and impedance matching of the amplifier motherboard to ensure it matches the speakers. Secondly, pay attention to the input and output interfaces of the power amplifier motherboard to meet the connection needs of different audio sources. Also consider the sound quality performance and protection functions of the power amplifier motherboard to ensure clear and stable sound quality and prevent problems such as overcurrent and overvoltage. Finally, you should also consider the brand and price of the power amplifier motherboard and choose a product with good reputation and high cost performance. To sum up, choosing an amplifier motherboard requires considering a number of factors to meet your personal needs and budget.
1. Divided according to the voltage used
The power amplifier board of the car audio usually needs to support 12V or 24V power supply. Some cars only have one set of batteries. In this case, we can choose the 12V power supply. ; and some cars have two sets of 12V batteries X 2 sets, here we need to choose a power amplifier board that supports 24V.
The power amplifier board for home audio usually needs to support the 220V connection at home to work.
If you often need to use it on the move in the car or at home, it is recommended to choose a 12V, 24V and 220V three voltages that can be used, also referred to as a three-purpose board.
2. Divide according to the number of speakers connected.
Subwoofers are usually monophonic and have only one channel. When connected to a BASS speaker that emphasizes bass, some people find it difficult to listen to It sounds like the bass is muffled, so someone started to connect a piezoelectric tweeter to the output to make up for the lack of sound. The sound produced by the piezoelectric tweeter is just sharp, not very loud. big.
Power amplifier motherboards are generally divided into multiple parts: audio amplifier circuit, power supply circuit, control circuit, protection circuit, noise suppression circuit, etc.
The audio amplifier circuit is the core part of the power amplifier, responsible for amplifying low-level audio signals; the power supply circuit provides stable power for the entire circuit; the control circuit is used to control the switch, volume, sound quality, etc. of the power amplifier Parameters; the protection circuit mainly protects the power amplifier from damage by short circuit, overload and other unexpected situations; the noise suppression circuit is used to eliminate noise in the power amplifier circuit. Each of the above parts plays a different role and jointly ensures the correct operation of the power amplifier.
The size of the power amplifier motherboard does not directly determine how large speakers can be connected, but depends on the output power and impedance matching of the power amplifier. Generally speaking, the greater the output power of the amplifier, the larger the speaker it can drive. Likewise, the impedance of the amplifier needs to match the impedance of the speaker, otherwise damage may result. Therefore, to determine how big a speaker you can connect, you need to look at the technical specifications of your amplifier and then choose speakers that match the impedance and handle the corresponding output power. In short, the size of the power amplifier motherboard is not the key to determining how big a speaker is connected, but attention should be paid to output power and impedance matching.
Amplifier motherboards from different manufacturers are not interchangeable. In fact, not only are motherboards produced by different manufacturers not interchangeable, but even functional motherboards produced by the same manufacturer may not necessarily be replaceable if they have different models. Because the working voltage, output power, input impedance, etc. of various power amplifier motherboards are different, especially the working voltage requirements are more stringent.
When choosing a power amplifier motherboard for high-power amplifiers, you can give priority to brand-name products to ensure high quality. Then, match the equivalent power amplifier board according to the power of your power supply. When purchasing, look at the heat sink and the entire board. The size is suitable for the chassis, and a three-stage tube board is better.
To repair the amplifier circuit motherboard, you first need to ensure a safe power outage and remove the motherboard from the device. Then use test instruments to check circuit components, eliminate fault points, repair or replace damaged components and circuit board connection lines.
When replacing components, you must strictly follow the original component parameters and pay attention to the temperature and time when welding to avoid damaging other circuits.
After the repair is completed, perform a functional test of the power amplifier circuit motherboard to ensure the repair effect.
Finally, reinstall the motherboard into the device, turn on the power, and conduct a comprehensive test to ensure that the repair effect is as expected.
Theoretically, bigger is better. It is used in power supply filtering. Theoretically, the DC voltage obtained by larger is "cleaner", the signal output by the power amplifier is less disturbed, and the sound quality is higher fidelity, and Since the voltage on the capacitor cannot change suddenly, when the power amplifier outputs high power instantly (for example, there is a big bass), the power supply voltage will not be pulled down instantly, so there will be no "powerlessness" phenomenon, which is the response speed. . But if it is too large, you need to consider whether the transformer and rectifier can withstand the large current at the moment of startup.
But everything has its limits, and infinity is unrealistic. Just like some people’s houses are too big to waste, and some people’s houses are just enough, just enough. Like DIY amplifiers, many people care about achievements. It feels like it’s hard to have a standard for sound quality. If you make it yourself, no matter how good it is, it may not be so in the eyes of others.
First of all, you need to confirm that your drawbar amplifier motherboard and DVD player have corresponding interfaces. Generally speaking, there will be an AUX input interface on the motherboard of the drawbar amplifier, and there will be an audio output interface on the DVD player. You can use a 3.5mm audio cable (usually a red and white pair) to connect the two. Plug one end into the audio output interface of the DVD player and the other end into the AUX input interface on the motherboard of the drawbar amplifier. Then, select the AUX input as the audio source on the drawbar amplifier, and then you can play the DVD sound through the drawbar amplifier. Remember to adjust the volume and input source for the best sound quality enjoyment.
How to install the amplifier board varies by brand and model, but generally speaking, you need to plug the amplifier board into a power outlet and connect it to the speakers.
The specific steps may vary depending on the brand and model, but you can refer to the following steps:
1. Plug the amplifier board into the power outlet and turn on the power switch.
2. Connect the speaker wires to the amplifier board.
3. Adjust volume and tone for best results.
The above is the detailed content of What are the key points in choosing an amplifier motherboard?. For more information, please follow other related articles on the PHP Chinese website!
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