This may sound strange, but I have no idea why my speakers want to be hooked up the way they are. They seem to have a mind of their own.
I have my fronts (Rti70's) bi-amped -- the highs going to an HK 525 and the lows to an HK PA 2000 amp. Everythings cool, no problems. Sounds fantastic. Well, yesterday I was changing out the banana plugs on the amp side, and when I finished and put in a CD, only the left speaker had bass. So I began to diagnose the problem. I figured it could only be three things -- the amp, the audio cable, or the speaker cable. So I switched the left speaker with the right one on the amp and then I only got bass on the right side. Cool, that ruled out a problem with the amp or the audio cable. Then I changed out the "bad" speaker cable, but the same problem persisted. Then I put the left speaker cable into the right side input on the amp and the right speaker cable into the left side again, and the speakers sounded like they were supposed to with music, but I was concerned about how they'd sound with movies.
I thought I would wait until today to try it again and see what happens. Same thing. Now I've got the left tweeter firing with the right midrange and vice versa.
How the hell did that happen???