ok heres the thing, i have a pioneer head unit that only has one set of rca outputs which i have my fusion 2000d ran to pushing my subwoofer. I want to put a little 140watt 2 channel amp for my mids/highs. The problem is that i dont know how i should install the second amp, should i just get an extra set of rcas and plug into the fusion amp or should i do the y split thing? also what about a crossover? please help!