Hello guys, it's been a long journey on gathering parts and planning my system. Wanting to do everything right the first time & not skimp on anything. I am now ready to start the install. But first, just wanted to say thank you to those who answered my last post. I ended up just getting two idmax 15's for the subs. The deal on the w7s I was going to get fell through. I'm sure I'll still be happy with these though. Any how, I ended up just selling the 3/0 awg welding cable I had and getting a roll of skyhigh ofc 2/0 awg for the same price. This stuff is way thicker than the welding cable and way more flexible. All Skyhigh wire is extremely high quality IMOH if anyone was looking at purchasing it. Anyways, now comes the question with running power cable. Currently I have a 370a McMahan alternator and a xs power d6500 up front with the big 3 done. The problem is I do not have room for an extra battery in the back of my truck. I may later try and see if I can stick another one under the bed. So therefore, I was thinking about doing two runs of power cable to my amps. The runs would be roughly 15 feet in length. My goal is to minimize voltage drop and maximize current flow to the back. The total RMS would be about 4,240 watts. With the class D efficiency of the amps at roughly 75% plus the extra 25% in wasted power, I'm looking at around 385 amps of current draw at 13.8v full tilt. If I did the math right. So with 2 runs of 2/0, I'd be looking at around a .45v drop (3.26%) in the back with a final voltage of 13.35. Again if I did my math right. So does this seem right or is it just over kill? What is the acceptable amount of voltage loss? I already have the cable. If I don't use it in my truck, then i'll end up using it for something else. If I use two cables for the positive I'll double up the grounds to the frame. Just to be clear about that.
XS power D6500
Mechman 370 amp alt
Covered top to bottom in Second Skin
HU - Pioneer DMH-C5500NEX
DSP - Alpine PXE-0850S
Front Stage - B2 Audio 3 way REF63
Front amp - B2 Rage 1200.6
Rears - B2 audio 2 way REF63 (active)
Rear Amp - B2 Rage 600.4
I have my reasons for rear speakers.
Sub Amp - B2 Audio Rage 2500.1
Subs - Two Image Dynamics IDmax15
Power cable - Skyhigh 2/0 awg ofc