when i bought the car i noticed the sub in the back didn't work, there's no sound at all coming through the sub!

i unplugged the amp and plugged it back and it wasn't the case.

is there a way to test if its blown or not?

 

Remember, the subs barely do much at all noticeable because bose sucks *****, so even when it's working it sucks.

Put a multimeter on the wires going to it. If it registers an A/C voltage, it's the sub. If it doesn't, then it's the amp, since there's only four audio channels that go to the amp.

 

Thanks bro .. I'm gonna try!!