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So I have a new system, fairly large, but I got it for cheap. 2 kicker 12in comp s and a kicker amplifier with 4g wiring. Have everything hooked up, but when I go to plug the battery cables back on...it blows the 80amp AFS fuse in the glass tube in the power wire. Now this is a new set, never used before. Why would this fuse be blowing over and over? The power wire is not damaged, the ground wire has a clean connection and the speakers work fine(so there is no short there) any ideas? Hopefully someone can help! Thanks guys
 

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What amp fuse does the amplifier call for. Does it say 80 in the manual? Are you positive you have a solid ground? How are the subs wired? Parallel or in a series. What ohm load?
 

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When you say new, do you mean brand new out of the box, or new to you? If you are blowing the fuse (80amps is extremely high considering modern amplifier efficiency) then there is definitely something wrong with the power connections, either with the leads or inside the amp.
 

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When you say new, do you mean brand new out of the box, or new to you? If you are blowing the fuse (80amps is extremely high considering modern amplifier efficiency) then there is definitely something wrong with the power connections, either with the leads or inside the amp.
Could also be why it was cheap. Could be a bad amp internally
 

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I do believe that this is a duplicate thread. Still, how do you know the speakers are fine when every time you give the amp power it blows the fuse?

I would remove the positive battery cable, and connect the power and ground for the amp. Remove all connections to the amp, except power and ground, then attach the positive battery cable. If it blows the fuse, then there is a problem with the amp or maybe a short in the positive cable going to the amp. Maybe the positive amp cable is short and arcing, causing the fuse to blow. Or maybe, the positive amp cable is melted on the engine and arcing to ground.
 

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Sounds like the amplifier is the problem. A kicker amp is stable at a 2 ohm load so impedance is not the issue. To verify this. Disconnect the speakers and reconnect power along with your 12 volt trigger (remote turn on). If amp blows your fuse again.... It has to be between the amp and power source. This can further be isolated by removing the power wire from the amplifier. Use caution handling these exposed power wires as you replace the blown fuse. With a multi meter to check voltage. If it reads 12 to 14.4 VDC... Gotta be the amp. Good luck
 

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Another thought came to mind as well:

Is the amp(s) mounted to a board to isolate them at all, or did you mount it (them) with screws directly to the metal of the rig?
 
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