4 gauge on 2 amps and a cap?

use O awg wire from the battery to the cap first all that, than use the 4 awg wire from the cap to the amps, what I would do, I used to have 2 amplifier on 4 awg wire, it doesn't work very good, I have sold my 4 awg wire all that, but my friend told me that I need 0 awg wire from the bat to the cap, and than use the 4 awg wire from the cap to the amps. Also, for what you use the cap is kind useless to the power output, I would get a D-block use 2 awg wire from the battery to the D-block than use the 8 awg wire from the D-block to the amps. Should be working out good, the reason my friend suggest me use the 0 awg wire is because I am but out 2 1000 watts RMS power from my amplifiers, which I am out put around 2000 watts RMS, I used a 2 farad cap. 1 farad per 1000 watts of power, cap just like a battery storage the energy, do to your amplifier outputs one is 300 rms another one is 200 rms your not going to get any where near 800 to 1000 watts of power, if you want that amount of power I would suggest you get a batter amplifier, such as kicker ZX750.1 amplifier or the Alpine M1000. good luck.