Hey guys, looking for some educating. I've been reading some articles lately about setting XO's for subs when you have big tower mains. Basically I'm seeing that settings should be around 80ish hz for towers, use the 'small' setting and let the sub handle the rest. It also advised against the double bass setting which I can understand. The thing that bugs me is since I'd have the XO set to 80hz, what is the point to the woofers in my 12's from then on?? Do they still do anything in the higher ranges? Do they help the sound at all now? Is it pointless to have towers and a sub??