Hi all, I am looking at a few different speaker options for my 19. In the front there are 6x9’s, and tweeters in the dash. This has led me to look at separates from Infinity, JL, and a set of Kicker separates. My question is; are the factory speakers in a non JBL Equipped Tacoma full range, are there crossovers on the actual speakers, in-line somewhere after the head unit\amp, or does the head unit itself do electronic crossover for the factory separates? Also, are the dash and front door speakers 4 ohms each, or do they present a different resistance?