Sorry to hear about your center. I am not sure what to do with it. Sounds like you may have to play around with it's location and tilt angle to get what you want. Since I do own the M60's from Axiom I know that you can call their customer service. They are very versed in placement and will be more then willing to help you through this issue.

On a side note. I got the Rocket 750's and they are AWSOME. I like my Axioms but the Rockets are in a whole different catagory. Take into account that I have the M60's, not the M80's when making this comment but I have to say that the Rockets are a much better all around speaker. In my head to head I found that the Axioms are fairly bright. The Rocket has awsome base and the music quality is a 10 where the Axiom would be around an 8.