Class B power amplifier can be around 150w, which pays more attention to functions, such as karaoke and theater decoding.
This brand is Guanao Power Amplifier DKK-A70. Accurately speaking, it is a professional karaoke power amplifier, stereo output, adjustable timbre, sound speed, delay and so on.
Output power 140W*5/ total power 340W.
The frequency response range is 1-50Hz.
Finally, talk about the matching of speakers and power amplifiers. I'm really sorry, I don't know the brand of your speaker, so I can't find its parameters, but you can have a look. The speaker is marked with two main parameters: power and impedance.
First of all, we should pay attention to the power matching problem in the matching of speakers and power amplifiers. The rated power of the loudspeaker should be equal to the rated output power of the power amplifier, so that the equipment can work normally.
The second is impedance matching. The output of the power amplifier and the input impedance of the loudspeaker should also be consistent. Although there is a slight deviation between the two, it will not have a significant impact on the sound quality, but only on the output power of the power amplifier. However, it must be reminded that if the input impedance of the speaker is much lower than the output impedance of the power amplifier, the distortion will increase obviously, and the power amplifier will be damaged in severe cases. So we'd better try to choose both.
Finally, talk about damping coefficient matching. The so-called damping is an index to measure the internal resistance of the output stage of the power amplifier for the damping of the speaker. If the damping coefficient is too high, the sound emitted by the speaker will be dry and not round; If it is low, it is easy to feel the sound sticking together.
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