O.K., another question i'm really baffled about. Some subs have a frequency range of 25 hz to 800 or even 1000 hz. But some of the nicer subs I've seen, like Infinity Perfects, only have a range of 25 to 250 hz. Since my mids only go down to 1000 hz, don't I need my subs to go up to 1000? or...