Yea, they do. My old system had two 12in mtx's with a 750 watt amp and cap, and sounded great. I just wanted a little something to add a lil thump to my truck, and I sold my old system after I got the truck, thought about putting it in the bed (i have a fiberglass tonneau) but I was told that would be a bad idea.
I did some searching and yea, the loc does separate the highs from the lows. Now I just got to do all the wiring. a real PITA.
Thanks for everyones help, I'm sure i'l be back with a few more questions while actually installing it.