Unlike a conventional speaker that creates audio waves by moving air as a result of the cone travelling in and out, this exciter speaker produces the audio waves by vibrating the flat panel it is fixed  

 230V input bluetooth amplifier board 2*10W

Bluetooth Class2 operation (up to 10 meters range).
 

Flat Speaker Exciter 2*12W with 4 mounting holes

 digital children watch MP3 player

 8ohm 10W flat panel speaker Exciter with mounting holes easy for connection

high quality 8 Ohm 10W Electrodynamic Exciter with mounting holes
easy for connection with wires

 flat panel speaker surface sound transducer 2-3W

PAM8403 2 * 3W Class D digital amplifier board 2.5-5V 

MAXIM 12V mini amplifier board 2*20W @4ohm with MP3 player

STA508 2.1 160W+80W+80W Class D amplifier completed board

TDA7492 amplifier board 2*50W can BTL to 100W MAX 

2*30W class D amplifier board 12V-24V