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lildragon45

Ok to use a higher amp fuse inline?

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Hi so I just picked up a Rockford Fosgate Prime R400-4D. Its 4 x 75 @ 4 ohms Class D. So they recommend having a 40A inline fuse. Would it be ok to run say a 60A or 100A instead? Pros and cons please. Also this what I have readily available at home. But if I should stick to the 40A then I will. Any input will help thanks. 

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Stick with 40A and the correct size wiring.


Thinking is the root of all problems...

You ALWAYS get what you pay for.

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Fuses are made to blow before the amp blows and possibly burns your car down , use what the manufacturers recommend . Also if your fuse is to high for the wire your using it will burn up and not pop the fuse.

Edited by Ron36

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Mids all Alpine type R 's 1 set of 6.5 components and 1 set of 6.5 coaxial 

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On 3/6/2020 at 9:43 PM, lildragon45 said:

Hi so I just picked up a Rockford Fosgate Prime R400-4D. Its 4 x 75 @ 4 ohms Class D. So they recommend having a 40A inline fuse. Would it be ok to run say a 60A or 100A instead? Pros and cons please. Also this what I have readily available at home. But if I should stick to the 40A then I will. Any input will help thanks. 

No absolutely no. The online fuse is a fire protection. If you replace it with a higher amp fuse and the power wire grounds out it will not break before damage is done to your power wires or  worse a fire. Changing to a larger fuse is not going to change the performance of the amp. If you want better performance by feeding more power, look into things like big 3 upgrade or more effective active cooling setups.

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