Amp install - fuse and ground question

[Mx5red]

I’m preparing to install an amp for dash/knee/sound bar speakers, and a small powered sub linked to the main amp.
I planned on running 4g power to the main amp (fused by the battery), a 600W 6 ch JBl, and splitting 8g power from that line to a small under seat powered sub.

I have two questions:
-Do I just need one fuse, close to the battery from the main 4g power feed? The sub also came with a fuse but it seems odd to split the main power and have another fuse on the line to the sub.
-it says to mount grounds from several amps to the same location, but I planned on mounting the main amp under the passenger seat, and the sub under the driver seat or behind the rear seat.
Is it a big deal to run the grounds from the two amps to two different locations?

Thanks

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[Jeepeto]

I’m preparing to install an amp for dash/knee/sound bar speakers, and a small powered sub linked to the main amp.
I planned on running 4g power to the main amp (fused by the battery), a 600W 6 ch JBl, and splitting 8g power from that line to a small under seat powered sub.

I have two questions:
-Do I just need one fuse, close to the battery from the main 4g power feed? The sub also came with a fuse but it seems odd to split the main power and have another fuse on the line to the sub.
-it says to mount grounds from several amps to the same location, but I planned on mounting the main amp under the passenger seat, and the sub under the driver seat or behind the rear seat.
Is it a big deal to run the grounds from the two amps to two different locations?

Thanks

You want to fuse that #8 wire. It's not rated for the same power as the #4 and the fuse protects the smaller wire size

 

[Mx5red]

You want to fuse that #8 wire. It's not rated for the same power as the #4 and the fuse protects the smaller wire size

Of course, I should’ve thought about that. Fuses protect the wire!

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