This is a very common problem and a typical problem with conceptual errors. The 8 ohm power amplifier is not correct in itself. The questioner may see some power amplifiers marked with 100W/8Ω, and think that the output impedance of this amplifier is 8Ω. This is actually a misunderstanding. The correct explanation is: With an 8Ω load as the test condition, the output power of this amplifier is 100W.
Whether the transistor or the tube machine is a constant voltage output power amplifier, the output impedance is very small. The transistor machine is generally below 0.1Ω, and the tube machine is higher, but generally it is below 1Ω instead of 8Ω. Transistor amplifiers have a strong load capacity. In principle, speakers with any impedance can be used. Of course, the impedance should not be so low that the amplifier can not be used or even overloaded. For example, connect a pair of 2Ω speakers (if any). Most medium and small power amplifiers will not be able to eat. For tube amps, there is a problem with the optimal load, that is, the performance of the circuit is best when the load impedance is a certain value. The optimum load impedance is usually several thousand ohms to several tens of kilo ohms, and the impedance of the speaker is only a few ohms. The phase difference is too large, so the output transformer is used for impedance transformation. The output transformer of the tube machine is usually equipped with different taps. Regardless of the impedance of the speaker , the set of taps with the same value (or proximity) on the output transformer can be mapped to the optimal load required by the amplifier. In summary, when the amplifier is equipped with a speaker , there is no need to worry about the impedance of the speaker . The transistor machine can be connected to any impedance speaker , and the tube machine can adapt to various impedance speakers by selecting the tap of the output transformer.
This is a very common problem and a typical problem with conceptual errors. The 8 ohm power amplifier is not correct in itself. The questioner may see some power amplifiers marked with 100W/8Ω, and think that the output impedance of this amplifier is 8Ω. This is actually a misunderstanding. The correct explanation is: With an 8Ω load as the test condition, the output power of this amplifier is 100W.
Whether the transistor or the tube machine is a constant voltage output power amplifier, the output impedance is very small. The transistor machine is generally below 0.1Ω, and the tube machine is higher, but generally it is below 1Ω instead of 8Ω. Transistor amplifiers have a strong load capacity. In principle, speakers with any impedance can be used. Of course, the impedance should not be so low that the amplifier can not be used or even overloaded. For example, connect a pair of 2Ω speakers (if any). Most medium and small power amplifiers will not be able to eat. For tube amps, there is a problem with the optimal load, that is, the performance of the circuit is best when the load impedance is a certain value. The optimum load impedance is usually several thousand ohms to several tens of kilo ohms, and the impedance of the speaker is only a few ohms. The phase difference is too large, so the output transformer is used for impedance transformation. The output transformer of the tube machine is usually equipped with different taps. Regardless of the impedance of the speaker , the set of taps with the same value (or proximity) on the output transformer can be mapped to the optimal load required by the amplifier. In summary, when the amplifier is equipped with a speaker , there is no need to worry about the impedance of the speaker . The transistor machine can be connected to any impedance speaker , and the tube machine can adapt to various impedance speakers by selecting the tap of the output transformer.
This is a very common problem and a typical problem with conceptual errors. The 8 ohm power amplifier is not correct in itself. The questioner may see some power amplifiers marked with 100W/8Ω, and think that the output impedance of this amplifier is 8Ω. This is actually a misunderstanding. The correct explanation is: With an 8Ω load as the test condition, the output power of this amplifier is 100W.
Whether the transistor or the tube machine is a constant voltage output power amplifier, the output impedance is very small. The transistor machine is generally below 0.1Ω, and the tube machine is higher, but generally it is below 1Ω instead of 8Ω. Transistor amplifiers have a strong load capacity. In principle, speakers with any impedance can be used. Of course, the impedance should not be so low that the amplifier can not be used or even overloaded. For example, connect a pair of 2Ω speakers (if any). Most medium and small power amplifiers will not be able to eat. For tube amps, there is a problem with the optimal load, that is, the performance of the circuit is best when the load impedance is a certain value. The optimum load impedance is usually several thousand ohms to several tens of kilo ohms, and the impedance of the speaker is only a few ohms. The phase difference is too large, so the output transformer is used for impedance transformation. The output transformer of the tube machine is usually equipped with different taps. Regardless of the impedance of the speaker , the set of taps with the same value (or proximity) on the output transformer can be mapped to the optimal load required by the amplifier. In summary, when the amplifier is equipped with a speaker , there is no need to worry about the impedance of the speaker . The transistor machine can be connected to any impedance speaker , and the tube machine can adapt to various impedance speakers by selecting the tap of the output transformer.
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