Wayne, thanks for the information, it's really helpful. I am running 2 subs, and it fills the bottom end really nice. I'm drooling all over the upgraded drivers, and the crossover upgrades seem logical to me. That pushes the price up quite a bit, which slows me down a little. Just a couple more questions. Do you have any advice on my break in question? If I get the new drivers, should I break them in before installing them in my cabinets? Are the Stage cabinets and the current cabinets the same? Do the JBL/B&C drivers use the same cross over as the Eminance drivers? If I'm building a pair of boxes for PA duty, what material should I use? 3/4" birch plywood? Can I go thinner, like 1/2" birch plywood? Thanks for the help.