08 galant GTS

Hi I have the 08 galant GTS and am running alpine type R 6x9s at the back and infinity kappa components in the front all running off of a 4x100 watt RMS amp. Now i am getting the pioneer tsw3002 sub which will run off of a 1000watt RMS amp and i think the alternator and battery wont be able to handle the load. I want to know which high current alternator and battery will fit. Any suggestions

Nobody have a good audio setup?

First do the Big 3. (0 gauge) and a second battery (car audio 0 gauge). and you should be fine. im running about 980w total

I've done 1 part of the big 3 i.e. battery to ground and i will do the remaining 2 soon but will the stock alternator handle a second battery? or even a well rated deep cell battery (if i find one that fits)