Electrical-acoustic transformation device

An electrical-acoustic transformation device, comprising:

• a vibration system and a magnetic circuit system with a magnetic gap;
• wherein the vibration system includes:
• a diaphragm, a voice coil provided below the diaphragm and suspending in the magnetic gap, a piezoelectric plate provided on one side of the diaphragm, a first frequency division circuit connected to the voice coil, a second frequency division circuit connected to the piezoelectric plate, and a spider fixed to the voice coil, the spider including a first conductive line and a second conductive line formed on a surface thereof;
• and
• the first frequency division circuit performs frequency division on an externally input first audio signal and outputs the same to the voice coil, with the externally input first audio signal being input to the first frequency division circuit via the first conductive line;
• and the second frequency division circuit performs frequency division on an externally input second audio signal to obtain a high frequency signal to drive the piezoelectric plate, with the externally input second audio signal being input to the second frequency division circuit via the second conductive line.