Quote Originally Posted by Kevio
I tried two positions and three crossover settings and a bit of diddling with the level and all is good now for me. There's a bit more to it than setting up a stereo pair but its fun and didn't seem to take too long for me. Perhaps I'm just lucky.

One thing I did not appreciate going in to this is that although my mains gave me a satisfying amount of low frequency output, they also put out a fair amount of distortion in doing so. Now that they're being helped by the sub, I've got a much cleaner bottom end
You mean that your mains are now high-passed? Or does it mean you play them less loud now that you have the subs?