Doesn't look like JL 250/1 has inboard fuses. Do i need to fuse near amplifier?

[Weeznur32 10+ year member]

Just bought a jl 250/1 and it doesnt seem to have onboard fuses.

Do I need to fuse the power wire by the amplifier? AND if so what amp fuse should I use?

THANKS!

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[murph 10+ year member]

30a fuse should be fine

edit: if it is running of the stock battery you should have a fuse put no more than a foot after that, if so you don't need one before the amp.

 

[Weeznur32 10+ year member]

okay I have a fuse at the battery but its like 80A. Should I put a 30A fuse in it?

 

[murph 10+ year member]

okay I have a fuse at the battery but its like 80A. Should I put a 30A fuse in it?

I would put a smaller fuse in, the 250 will put no where near 80a worth of current draw through the wire.

 

[All_Logix 10+ year member]

Are you running multiple amplifiers? If not than replacing the primary fuse under the hood is fine, but if you have a distro with multiple amps, you need that larger fuse for the main power line and then a seperate smaller fuse near the JL amp between it and the distro

 

[Weeznur32 10+ year member]

the JL is the only amp i am currently running. Thanks

 

[RAM_Designs 5,000+ posts]

At the battery, just fuse for the wire, not the amp(s). So if you have 4 gauge, fuse at 120-150amps. 0 gauge, 250-300amps. Then if your amps don't have fusing, simply fuse for them before the amp.

That way, your wire is fused for max capacity at the battery, and you can just change the amp(s) fusing whenever needed. Most amps have on-board fuses, so it usually isn't an issue and you can just fuse for the wire capacity at the battery and let the amps take care of themselves.

 

[murph 10+ year member]

At the battery, just fuse for the wire, not the amp(s). So if you have 4 gauge, fuse at 120-150amps. 0 gauge, 250-300amps. Then if your amps don't have fusing, simply fuse for them before the amp.
That way, your wire is fused for max capacity at the battery, and you can just change the amp(s) fusing whenever needed. Most amps have on-board fuses, so it usually isn't an issue and you can just for for the wire capacity at the battery.

That is a genius idea.