80 AMP or 150 AMP fuse

[yo0123yo 10+ year member]

Right now I have a kx1200.1 running 2 12" L7's and I'm using 4 gauge power and 4 gauge ground wires, my wiring kit came with an 80 amp AGU fuse and my kx1200.1 amp came with a 150 amp ANL fuse, i was wondering, is a 150 amp fuse too high for 4 gauge wiring? also, would i notice any change at all in my system if i switch from 80 to 150?

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[M@nJo 10+ year member]

150A is probably the highest and safest amperage to run on 4ga wire.

i would go ahead and use the 150A anl over the 80A. im sure the kx1200.1 uses at least 120A on the amp itself.

 

[nole16k 10+ year member]

If you currently have the 80A installed, I'd just keep it. The max current draw from my Infinity 1211 is ~120A, and I've got an 80A AGU that hasn't blown yet after a few months.