power wire and distribution block

I'm doing a big audio upgrade in my 2006 Crownline 236LS (Boat) and I have a couple of questions that I can't seem to find the answers for.

I'm installing a Profile AP1000M amp to power an Alpine SWR 1042D 10" DVC Sub that I'm running at 2ohms.  I'm also installing an Infinity Reference 475A 4 channel amp to power 4 new Infinity 602M speakers.

After some research on this forum I decided on using 1/0 power and ground to a 1/0 to 4 guage distro block.  I'm running the ground back to the battery because the grounding block on the boat can't handle the load.  So basically I'll have 2 runs of 1/0 guage (power and ground) to 2 distro blocks.  Then 4 runs of 4 guage (power and ground for 2 amps).

1. I've got about 15 feet to go from the batts to the amps.  Do I want to run 10 feet of 1/0 guage and then distro followed by 5 feet of the 4 guage.  Or shorter 1/0 guage and longer 4 guage?  Or does it matter?

2.  One of the 4 awg amp kits I purchased seems to only be about 4.8 mm compared to the kicker kit I purchased which is easily 6mm or larger.   Is it imperative that I get some more "true" 4 awg wire or should I just use the "cheaper" kit for the amp that's pulling less power?

I appreciate any comments or feedback.  Taking friday off to install all my goodies!

I believe that you have everything covered. Run the power and ground with 1/0 guage all the way till you get close to the amps, then get a disrtobution block (make sure you get the right size fuses for each amp) and seperate each to 4 guage. The only thing I would suggest is to get to within at least 3 feet before using the distrobution block. The thing to remember is the closer the better.

1. It doesn't matter.  However the install works out best for this situation.  Your wiring is plenty large for the application.

2. Use the wire you have.  It will be easily large enough for the task.

The fuses in a fused distro are for the outgoing wires (in this case, 4 gauge), not for the amplifiers.  The amps have fuses.

One more question.

I'm fusing the 1/0 guage power wire with a 300 amp ANL fuse.  I've read on some other posts that a fused distro is not needed.  And from stevdart's comment I'm reading that as....

The fuse on the main 1/0 power line near the battery should be sufficient and no more fuses are needed?

Other than those in the amps themselves of course.

I will definately take some pictures.  I had the neighbor come down last night with his benzomatic and solder on my terminals to the 1/0 guage power and ground wires.  Took some pics of those.  I'll be sure to take pictures along the way and I'll post a good after action report when I'm finished.

Thanks for the suggestions and the information.