Originally Posted by
redefine
look. tbh, the specs are always safe. usually done for the system constantly running at full power, which in an audio setup rarely happens (usually only peaks at that at certain times, and runs constantly at a lower level). so you will probably get away with still using the 8awg cable. using the 8awg cable for both amps will result in a less efficient system and slightly less power as you would get with 4awg, cause you'll get about 1v total voltage drop.
you wll probably get away with it...but if it were my system. i'd use the 4awg cable.
rewiring isnt that hard once you already have it wired. all you need to do is somehow attatch the replacement wire to one end of the current wire, and pull the other end. as the origonal wire is being pulled through, it should bring with it the replacement wire, which is much easier then doing it the first time.