So what do you guys suggest a 100v-16v transformer with 0.81 A current from secondar? Am i right....but i guess the speaker needs 20w input...it wont work..Yep.
That's why I suggested the photos. Voltage and current requirements would depend most on what appears to be a 5-pin amplifier chip mounted on the heat sink. (Maybe a TDA-type) And, the photo in post 14 shows a 13W input power.