well i have the kicker zx2500.1 i just got, havent hooked it up yet, i am just getting everything ready, i have to upgrade my electrical first which im in the process of that, i just have bought everything i need so far, wire, terminals, fuses, volt meter, thats all so far, thats why i was asking about the rcas and speaker wire, cause i will buy some if it helped, deffinatly speaker wire cause i dont have any yet except small 18 gauge wire to run my mids and highs? i dont have any subs right now either i sold my 12s to upgrade to some 15s when i get the extra money, i am just getting amps and power set up now, except new batteries and alternator, i need more money for that stuff, so do you think leaving the 4 gauge wire would be fine or would it help at all? thanks