For some reason, when I plug my Klipsch RF-3 speaker(which I turned into a center channel) in using the top two inputs on the back, I get nothing but tweeter sounds out of the speaker. However, If I use the bottom two inputs I get nothing but the woofer sounds. If I use the black input on the bottom and the red on the top, I get nothing but woofer, and if I use red on the top and black on the bottom, you guessed it, nothing but tweeter. What the hell is going on??????