Power wire fuses?

[SnowCommando 10+ year member]

Picked up a Pioneer GM-D7400M Mono Amp to run my sub.

The wiring diagram in the manual shows a fuse holder at the battery and says Fuse (40A) x2.

Any ideas what they are specifying? Do I need to somehow run two 40A fuses or an 80A fuse? Or do they just want me to use a single 40A fuse and have a spare 40A fuse around.

The mono amp has 2x25A fuses in it.

I'm also running a 4 channel amp which has 2x25A fuses in it. It uses a 30A fuse in the power wire.

I'm using 4ga wire to a fuse holder near the battery.

4ga to a fused distribution block to 8ga into each amp.

Any interpretations on the 40Ax2 would be appreciated.

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[blackdragonaudi 10+ year member]

There is one fuse in line right after the battery than another in the amp. OR it could be talking about 2 fuses already in the amp. Mine has 4 fuses in the amp.

EDIT Ya I looked in the manual and I see what your are looking at its just the fuse at the battery and no you don't need 2 fuses.

 

[SnowCommando 10+ year member]

Cool. Thanks for looking. It seemed super weird to have 2 fuses at the battery. I'd rather find out now though than watch the amp detonate.

I wonder why they say 40Ax2 then?

 

[loopkiller 10+ year member]

Cool. Thanks for looking. It seemed super weird to have 2 fuses at the battery. I'd rather find out now though than watch the amp detonate.
I wonder why they say 40Ax2 then?

Some types of fuses are not made larger than 40A. If you use ANL style fuses, you can get them as high as 750A.