Hello everyone! I´m from Brazil. I have some technical background in electronics and computer engineering. I don't work with it currently, but this is my hobby at home. I recently fixed a JBL ES250P active subwoofer that I would like to post here, because I used a Chinese amplifier and there was a forum here on diyAudio about this amplifier that I used and it helped me a lot. I would like to share now the experiences I had and the changes I made both to the Chinese power amplifier and also to the original JBL audio and protection circuits to make this JBL subwoofer work again.
For those interested in this JBL ES250P subwoofer recovery project, I created a thread explaining a little more about everything that was done to recover this subwoofer, using a new amplifier board, where I made some modifications to it in order to reduce the temperature and preserve the original JBL protection circuits. Follow the link below:
https://www.diyaudio.com/community/...ration-and-thermal-improvements.426353/latest
https://www.diyaudio.com/community/...ration-and-thermal-improvements.426353/latest