well, I have been playing with my drums tracks for a while now, and have come up with something that can be really cool [depending on what you are using it for]. what I do is record my kick track, and then take it and run it through my PA's crossover, and record another track from the subwoofer output. It works wonders on getting the right amount of bass, and if you use it more than you should, is kinda nifty on hip hop beats and whatnot. Too bad I hate that kinda music. I find that it can really fill out a mix if there's a breakdown of some sort or the drums become the main focus for some reason .