Have been looking into making my own audio crossover for the car, and am just wondering what would be needed. Although I have upgraded my speakers, and with it came a resistor for the tweeters, is that the same thing? Or should i use the cables that were for the original tweeters? Little bit confused if i should build my own or leave as is. Cos apparently a crossover will give better sound quality as itactuallysplits thefrequencies??