the specific standard of power configuration of power amplifier and speaker should be: under certain impedance conditions, the power of power amplifier should be greater than that of speaker, but not too large. In general applications, the distortion rate of the power amplifier should be about 1.2-1.5 times of the rated power of the speaker; In large dynamic situations, it should be about 1.5-2 times. According to this standard, the configuration can ensure the power amplifier to work in the best condition and the safety of the speakers. If the power amplifier standard is 18W, it is more reasonable to match the speakers with about 12W (the same output impedance). The back of each speaker is marked with 2-8W, 2W refers to the tweeter power, and 8W refers to the woofer power. Together, it is 1W, which can be used in your power amplifier.