Hi everyone, 

I have been playing aroud with some fine adjustment of my bass setings on my sub and suddenly after increasing the bass settings from -1 to 4-5 , the sub said “BANG” and went quiet for ever. No LED indication or any signs of life. I then decided to open it up and find that my PCB is burned. 

I do not have that much expirience around fine electronics so I would kindly ask you for help. 

I took a closer look under the burned spot and all looks find, so I assume that issue is only with those components on the top layer. 

Did anyone had a similar issue?