800rms stock alt, wiring.

[KMS]

Wondering if a 80alt amp on a 4gauge power wire would be enough to handle 800rms for a sub, and about 125rms-X4 for mids and high (does that even matter?)

I don't notice any kind of dimming as of now on a crescendo 1000c4.

I have channels 3/4 bridged for the sub at 500rms. Then channels 1/2 have 4 speakers wired into them,so I'm guessing it's seeing a 2ohm load. 250w x4 channels at 2 ohms.

Would it be better to get a 120amp alt from a GTI? or a HC800 from kinetic,

[bokeson]

I'd do the big three in either 4ga. or 1/0ga just to help your electrical a little. not needed but I would do it if I were you