I just noticed the center is not playing either...lol I guess it hasnt the whole time except for the calibration tests. I set the mains to small since they are bookshelves. I have a denon avr e400, bic center, bic bookshelves for mains, and a bic f12 sub. The center and the sub are not working. Thanks for taking the time to look. Any help would be much appreciated!!