2002 Expy Sub ???

[RI-Matt]

I've tried searching but didn't really find the answer.
I have a 2002 Expy EB with the Mach Stereo ( sub in back ) anyway the sub just stopped working the other day. There was no indication the woofer was blown like bad sound or anything.
So what I was hoping was someone could tell me if there is a seperate fuse or something for the sub amp ( my 06 150 has one ) Is there anything else I should look for ???? Do the amps mounted to the sub box blow ???

Thanks,
Matt