Let me preface this by saying this isn't a project I'm working on, but more to help me understand how this would work.. probably basic stuff, but before I make any assumptions I'd rather someone who knows clear me up. How do horns/tweeters influence impedance? If I design a cab with a single 1x15" 8ohm driver in it, and a horn tweeter also with an 8ohm impedance rating (assume proper crossover), how would the cab be wired for various impedances? Does series/parallel wiring work the same way between horn/driver as driver/driver (ie: 2x15 wired for either series: 16ohm, or parallel: 4ohm). If I'm completely wrong in my thinking or not clear enough, please let me know.