Amp wiring and distribution block question

[lepht93 10+ year member]

Hi,

I'm attempting to wire my head unit to 2 amps. I have the RCA wiring down, and pretty sure I've got the remote turn on done, my question comes to the actual power wiring.

I have 2 amps. One Pioneer GM-D9500F and one Pioneer GM-D8500M (monoblock).

The specs for both amps are as below:

GM-D9500F:

14.4V DC

current consumption: 25A

Average current draw: 7.9A at 4ohm for 4 channels

75W RMS x 4 @ 4ohm

Fuse: 40A x 1

GM-D8500M:

14.4V DC

current consumption: 27A

Average current draw: 7.5A for 1 channel @ 4ohm

300W RMS x 1 @ 4ohm

Fuse: 30A x 2

I want to run a single power cable from the battery (roughly 5 metres/16ft), with an inline fuse about 6-12 inches from the positive terminal, then running through the car into the boot, where it runs into a fused 1 in, 2 out distribution block. The 2 outputs at the distribution block will run into each amp, then each amp will be grounded separately.

My questions are:

Judging by the specs, what fuse rating should the inline fuse be?

What rating should each fuse be from the distribution block (I'm assuming they'll differ)

and What AWG wire should i use from the battery, then from the distribution block to amps?

I was thinking considering the 9500F has a 40A fuse in it, and the 8500M 2x30A, then its 100A total, so 100A inline fuse at battery, then a 40A fuse on one part of the distribution block, to the 9500F, and 60A to the other, on a 4 AWG wire?

Sorry for no pics, it wouldnt let me link URL or images.

Any help is appreciated. Thanks

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[dipitydoo 10+ year member]

fusing is based on wire gauge, not to protect the amp. 4 gauge is fine for those amps. 100 - 150 amps for the fuse is good. since your amps already have fuses, it is not necessary to fuse the wires at the distribution block, but i guess it can't hurt.

 

[lepht93 10+ year member]

Thanks

So, if it's 100-150 amps at the fuse near the battery, how many would you recommend for the fuse in the distro block for each amp?

And would 8 AWG from each wire coming out of the block be ok?

 

[keep_hope_alive Premium Member]

4 awg from the battery to the distro block would be a good size, i agree with a 100A fuse size.

at the distro block, you can size the fuse for 60A and use 8awg wire for both amps. the amp fuses will protect the amps.

 

[dipitydoo 10+ year member]

for 4 gauge at 15 - 20 feet, up to 150 amps is good, i believe. so, 100 - 150 is fine. for the 8 gauge at the distribution block, somewhere in the neighborhood of the specific amp's fuse rating should be fine.