Did I blow my amp?

FVCK how do i check if the fuse is messed? I looked at it and it might have a little line in it ll go check again. Its a 300amp wafer fuse the kind that comes with kicker 1/0 kits

 
If it is burned and the "link" is broken then it's fried... Check your amps fuses too.

edit: When I say fried I mean the fuse... Not necessarily the amp

 
Well, from a technical point of view, you might have fried every single component in the amp that was not connected to a dedicated (LM7xxx) voltage regulator, positive or negative. On the other hand, some amps I've seen have diodes on the inputs/outputs to prevent this from happening, to make sure the current flow is in the right direction and won't flow the other way(layman's terms.)

You would not put 12V to the frame unless the freewheeling diodes in the SMPS's mosfets started to conduct, conducted through the transformer's primary winding, through the other set's freewheeling diodes, and to ground, which those internal diodes WOULD explode very easily because of their dissipation values and voltage drop, and blow a fuse.

 
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