| 摘要 |
The present invention relates to an audio amplifier configuration for a low bandwidth expansion of a full range speaker. To solve the demerit of the full range speaker having high low bandwidth cutoff frequency, the current of the full range speaker which is connected to the audio amplifier is measured and becomes negative feedback, thereby improving a low bandwidth driving force by an increase of an amplifier output voltage according to an increase of the speaker impedance in a lower bandwidth. A frequency correction circuit is installed to the output of a current detector in a middle-high bandwidth region, thereby obtaining the stability of output sound pressure. |
