Music Power (MPO), originated from German Industrial Standard (DIN), refers to a short-time maximum power that the speaker can withstand. This is because when playing a music signal, the amplitude of the audio signal is extremely large, and sometimes the peak of music power exceeds the rated power in a short time. my country's national standard GB9396-88 has a power label standard with maximum noise power, long-term maximum power, short-term maximum power, rated sine wave power. Usually speaker manufacturers take the label power of speakers with long-term power or rated power.