8 gauge wire into 4 gauge on amp?

[straightshot7]

Would it be fine to run 8 gauge power and ground with amps that have 4 gauge inputs? I want to buy a Rockford fosgate 4 gauge dual amp kit but they have 8 gauge to amps after distribution block would I lose power to my amps which would be a prime 400-4 and a prime 750-1 or a prime 1200-1 haven't decided

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[jrdnhsnbrg 10+ year member]

For the 400-4 8ga will probably be fine, but for the 750-1 you will want 4ga to get full potential. I'd suggest running 0ga from the front battery to a distro or fuse block with 0 in and dual 4 out, same setup for ground. That would leave some room for upgrades in the future, too.

 

[trumpet 5,000+ posts]

If you keep the 8 ga wire lengths as short as possible that will be fine for the 400-4 and the 750-1. Wire ampacity is dependent on length, and shorter wires can handle more current.

 

[straightshot7]

Ok thanks guys i decided to run 4 gauge total i would run 1/0 but buget is limited and i dont plan to upgrade for this car just a small system so 4 gauge is it, also since the amps have fuses would I still need to run a fuse block before amp? Ill start with just the 400.4 so would I be fine not to run a fuse block before amp just one under hood that comes with kit then when I'm ready to get a sub amp 750.1 ill pick up a fused distrobution block before amps

 

[mylows10 5,000+ posts]

Ok thanks guys i decided to run 4 gauge total i would run 1/0 but buget is limited and i dont plan to upgrade for this car just a small system so 4 gauge is it, also since the amps have fuses would I still need to run a fuse block before amp? Ill start with just the 400.4 so would I be fine not to run a fuse block before amp just one under hood that comes with kit then when I'm ready to get a sub amp 750.1 ill pick up a fused distrobution block before amps

i sell amp kits , and the amps you'll be using needs 4 gauge wires , that why the inputs are there.the 0 gauge is a better option tho , you can do a cca kit for $100 shipped from me with 2 rca's for the amp , and the distro block ,with 4 gauge wire for the one amp .if you want a kit for both amp with 3 sets of rca's i can do one for $125 shipped . 17 ft power 3 ft ground , 3 sets of rca's, 17 ft remote,12 ft of ofc 4 gauge , the fuse block and fuse and a distro block

 

[straightshot7]

What kinda wire is in the kits

 

[straightshot7]

Is it a good brand? Also size of wire is it 1/0 or 4 gauge

 

[jrdnhsnbrg 10+ year member]

What kinda wire is in the kits

I think he uses Sky High, I got a Big 3 kit and 40ft of 0ga. from him and it is truly beefy stuff.

 

[ShayneF 10+ year member]

Ok thanks guys i decided to run 4 gauge total i would run 1/0 but buget is limited and i dont plan to upgrade for this car just a small system so 4 gauge is it, also since the amps have fuses would I still need to run a fuse block before amp? Ill start with just the 400.4 so would I be fine not to run a fuse block before amp just one under hood that comes with kit then when I'm ready to get a sub amp 750.1 ill pick up a fused distrobution block before amps

No need to fuse just before the amps. You can buy a distribution block (if you need one) without fuses. If you are fused at the battery, and using the fuses in the amps then that is enough protection in my opinion.

 

[mclerico83 5,000+ posts]

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