| 摘要 |
An exemplary speaker system includes a speaker, an audio amplifier, a detecting resistor, and a control unit. The audio amplifier is connected to the speaker and outputs a working voltage to the speaker. The detecting resistor is electronically connected between the speaker and the audio amplifier. The control unit is connected between the detecting resistor and the audio amplifier. The control unit detects a voltage of the detecting resistor, calculates a real-time power of the speaker, and compares the real-time power with a rated power of the speaker. When the real-time power equals to or exceeds the rated power, the control unit adjusts the working voltage until the real-time power is below the rated power. |
