Four criteria for judging the quality of power amplifiers

Power amplifier is abbreviated as power amplifier, commonly known as "amplifier". It is the basic equipment in the audio system. Its task is to amplify the weak electrical signal from the signal source (in the audio system from the mixer) to drive the speaker to emit sound. The power amplifier is so important in the entire audio system, so how to judge the power amplifier?

We can pick out the speakers that perform well in synthesis (vocal tunes, instrument tunes, dance music tunes, and microphone vocals), and use this speaker to PK the power amplifier. The methods and conditions for measuring pros and cons are roughly as follows:

1. Use the same sound source, the same well-recognized speaker, and the same tune to compare the two power amplifiers by PK machine or PK line real-time switching, pay attention to the changes in the sound quality, tone and music dynamics at the moment of switching, and select the appearance performance Good power amplifier.

2. If the power of the power amplifier is large, the sound of the speaker will be strong and dynamic, and the rhythm will be clean and tidy, while the sound of the low-power power amplifier will feel a little weaker and the sound will be slightly lower.

3. The high power of the power amplifier means high cost, and the low power means low cost. In addition, using a power amplifier with sufficient power to push the speaker will make the sound system more stable. On the contrary, when the power is equal to or less than the speaker, the sound is easy to be distorted and unpleasant, and it is more likely to burn the speaker (civilian (Except for HiFi tube amplifiers).

4. One of the important indicators of a good power amplifier is that the sound quality is clean and natural, with clear layers and soft hearing, while the poor sound quality of the power amplifier is not clean and the sound is rough. When the sound source, speakers, and discs (songs) are relatively good, the performance of the power amplifier is easier to identify with PK.