does anyone use subwoofers in their setup?

[baconbrain]

So I set the delay for the subwoofer preout as mentioned above and from an sw integration perspective, it sounds like a step in the right direction. I have now been experimenting with the phase settings (my sw has four, 0,90,180,270) and percieve 90 to be the one which gives me the best results, but what exactly is phase doing? I read the sounddoctor article, but still don't get it ...

Can someone enlighten me?