The big 3 upgrade is where you upgrade the power and ground wires that go from your alternator, to your battery, to your chassis, and then finally to an engine ground. This will help increase the amount of power that can flow through your system. You're only as strong as your weakest wire, this means that BOTH the power and ground wires must be upgraded, not just one of the two.
Here is a sample picture of a big 3 upgrade...
(Notice, Red is the power wire from your alternator to your positive battery post...Blue is going from the negative post on the battery to the chassis....Green is going from the chassis ground, all the way to the engine ground...and that's the big 3...REMEMBER not all engine compartments will look the same, some are MUCH harder to find where to put the engine ground.)
How to do the big 3 upgrade.
The materials you will need will be 12-20 feet of 1/0 gauge wiring (the length will vary depending on how far apart things are in your engine compartment.), any grade sandpaper , protective sleeving of the same length so that your wire will be protected, connectors for all ends of the wires, and zipties to secure the wiring. If you do the job correctly, you should have 3 runs of wire...which is why they call it the big 3.
The following bullets are instructions on how to do the big 3 upgrade. (I will provide a picture of my own setup when I get the chance to search through pictures.)
Remember, CAREFULLY measure each length of wire before you cut so that you do not end up short on wiring when you go to attach them.
How to do the big 3 upgrade.
The materials you will need will be 12-20 feet of 1/0 gauge wiring (the length will vary depending on how far apart things are in your engine compartment.), any grade sandpaper , protective sleeving of the same length so that your wire will be protected, connectors for all ends of the wires, and zipties to secure the wiring. If you do the job correctly, you should have 3 runs of wire...which is why they call it the big 3.
The following bullets are instructions on how to do the big 3 upgrade. (I will provide a picture of my own setup when I get the chance to search through pictures.)
Remember, CAREFULLY measure each length of wire before you cut so that you do not end up short on wiring when you go to attach them.
- Cut, sleeve, and attach one piece of wire from the power bolt of your alternator to the power of your battery.
- Cut, sleeve, and attach one piece of wire from the negative of your battery to a part of your chassis nearest to it. (To get the best results, use your piece of sandpaper on the chassis where you connect the wire.)
- Cut, sleeve, and attach one piece of wire from the chassis (where you sandpapered and have the other wire) to the engine ground. (This is the hardest part to do and requires getting up under the vehicle. The best way to determine the "engine" ground is to check for a bolt that has a bunch of other tiny wires running to it.)
There you go...now you know how to give your sound system a little extra juice.
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