what amps u running, on my 1400 uno, I upgraded the wiring from my alternator to the battery with 4 guage cable, and it made a world of difference. do not buy a cap, especially the 1 farad caps from autostyle etc, they do not work, rather spend the cash on 4 guage cabling to ur amp(s), and bigger battery and alternator. if u want a cap, u can buy a 20 or 40 farad from rockfordfosgate, they are worthwhile, but prices start from R2000.
L8R