This happened last nite in my brother's car. Subs are Power Bass XXL something and one Earthquake D3 to power them. This happened while driving and playing music. The sub was on fire for good 20 minutes.
Did not have any water so there was nothing we could do but just watch it burn and make a VIDEO!!! you can even see the flames going out of one of the ports.
after that we just left it at the side of the road in the bush until this afternoon.......
you can see the ports kinda melted
this is the GOOD sub, the one that was not on fire...
Here are the spider and the cone of the sub that was on fire
my guess is something shorted out. the amp was fine after all this. i dont know if the other sub still works cuz it looks pretty fried from the fire comming out of the burning sub.