Hey Scott99,
I experimented with my single wire going to the top and bottom on my Mission 753s and there was a difference...pretty much what you'd think...the lower had more bass, and the upper had a nice top end but lacked some bass warmth. I switched to bi-wired cables and now I have the best of both worlds. From that experience, I'd say that a set of jumpers would be an improvement over the connector bars that come with the speakers (and cheaper than buying bi-wire cables).