Can your use the power wire that they sell at home depo to do the big three upgrade or is it better to just get wire from a car audio store?
I would recommend against it. Power wire for car audio is made up of strands where the stuff from home depot is solid. Stranded wire is easier to bend and causes less resistance when it is. Also car audio wire has a coating to protect it from the elements such as heat, where home wire does not hold up as well. Keep in mind that because one is stranded and the other is solid the gauge size is different.
You can use any wire as long as it is the proper gauge required for the job you are doing! I am sure it will say in your installation instructions on which gauge of wire they reccomend for proper installation of the equipment you are installing
yup you can use any wire as long as it can handle the amps to calculate take the watts of the amp divide it by the voltage which will be 12 and that will tell you how many amps your wire may need to handle i would double the amps in the end to be safe and if you want to upgrade your system think about even heavier wire the bigger the better
you can but it is discouraged because of low strand count. and since its not oxygen free copper.
the wire from homedepo will work alight its just not real flexible but it will work
