Sonnie,
Thanks for the very helpful reply. I thought that would probably be the case, but I wanted to check and make sure before I just started trying to connect different things
I'll go ahead and use my receiver's bass management to cross over my speakers at 80 or 100 Hz (I'll have to see which works better). My mains really aren't full range (45 Hz +/-3db), they were just set that way since the sub was connected to them--so that I could use the sub's internal crossover. So, I'll set my mains back to small, although I may try them set large too, just to see. Thanks for your help and for sharing your knowledge with newbies like me!