short big3 with 4 gauge

[ajm 10+ year member]

I did some searching and couldnt find anything to help out very much so I figured that I would post. I plan to do the big 3 here within the next week but am still debating on using 0 gauge or 4 gauge. Being that I can get ahold of some 4 gauge eaisly as well as cheap around here. For some 0 gauge I would have to order,etc.

Although would it be possible for me to get away with using the 4 gauge being that the distance from the negative to ground is about 8-10", alternator to battery is about 2-3ft, and block to chassis is about 2-3' as well. Or is wire length not really a factor when it comes to doing the big 3? I will be running 3 10" l7's on a power acoustik a3000db, and the components on a mtx7402 or kicker 250.2 amp. The total amperage of the mtx is 105 (im unsure of the kicker) and the power acoustik asks for a 150 amp fuse.

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[n2audio 5,000+ posts]

Wire length is always an issue.

Worst case scenario would be 7' of 4 ga. At that length you'd have to be drawing close to 300A from the charging system for it to be any sort of bottleneck. Even if you're running both amps at their peak output (which would require 1 ohm stereo or 2 ohms mono with the MTX) there is no reason to think 4 ga grounds under the hood would ever be a problem.