This question is two-part:
First, I have an opportunity to add another PW-2200 subwoofer (which I currently love) to my HT setup for dirt cheap. To date I've just used one sub, and usually no sub for stereo music playback. I'm wondering if adding a second sub would (or has been known to) improve bass in stereo. My logic here is, if there's two of everything else, shoudn't there be 2 subs? Of course, I am aware of the omni-directional characteristics that lower frequencies deliver, and perhaps that's why 2 subs isnt' essential. Does anyone have any experience with this? Would I just be adding more power?

Second, would there be any drawback to hooking the second sub up by splitting the signal from my receiver to the 2 subs?
Thanks