I'm going to be using four amps in my install and require some input on the power side wiring of this install.

First I'll be using:
One 75X4 at 4 ohm amp (for the mids and highs)
One 150X2 at 4ohm, or 240X2 at 2ohm (for mid-bass)(still undecided on the drivers as of yet
Two 1500X1 at 2ohm amps (for the sub)

All amps have a max size of 4 gauge for their power connections.

I was going to run 2/0 gauge welding cable to a distribution block then 4 gauge to each amp from there.

My questions is:
Will all the amps be getting enough juice from the 2/0 cable to make their rated output with this set-up?
Or
Should I run another power wire from the battery for the sub amps?

I'm going to upgrade the big three, and install a second battery in the trunk.

Thanks for all the input,

 

2 Guage would do the trick, but i would definately run 0 guage if it was me.

 

He's running 0/2, not 2, which is bigger than 0/1.

 

2/0 does not equal 0/2

 

For the record, it says 2/0 gauge on the cable, which I looked up and it is 00 gauge.

Sorry for any confusion.

 

The printing on the cable unfortunately has no bearing on the actual true diameter of the conductor inside any more.
The world is short on copper lately, and a lot of manufactures seem to scrimping on strands.
You don't mention the length of the run (which is critical to properly calculate the voltage drop), or the drop that you are willing to live with, but I'd say a copper cable of .30" dia should suffice for most vehicles to keep the loss less than .5 Volts.
When it really comes down to it, wire is like power....you can't ever have too much...just too much for your budget.

 

I'll be runnin about 15' of it connecting the positive poles of the batteries together, then about 2-3' to the distribution block.

I just measured the OD of the copper in the cable with a vernier, and got: 0.420"

I hope i didn't forget anything else.

 

here's a calculator that's quite handy....be sure you're measuring the copper only...not the insulation.

http://www.stealth316.com/2-wire-resistance.htm

 

15 is good, but the next few feet will get you a massive loss.

 

2 gauge like stated would be fine be 0 would be better for that much power.