You're going to want at least 4 gauge for this amount of power. 0 gauge would be great, but its pretty hard to manage. 4 gauge isnt that bad to deal with, I have it run in mine for 2 1500 watt amps, works great.
If it is true 2200w, you will want to run 2/0 awg wire. Most likely thats the max power rating, if its an off brand amp its probably closer to 800-1000w, or less.
You may also want to upgrade your alternator if your running that much power.
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