Axiom Home Page Forums General Discussion Technical Questions Question about balanced and unbalanced inputs

I was looking at getting a Crown power amp one of the XLS series. I noticed that they only have a balanced input and my AVR has only unbalanced output on the pre out. is there a way I can wire in an unbalanced output to a balanced input? Aslo I see it has what looks like volume controls on the front for each channel. What would you set these at is I use the volume on the per amp? Or if anyone can suggest another power amp to use. I only habe about $300.00 to spend on one and the XLS 202 falls within that price range. The reason I want to get a power amp is to one day be able to drive a pair of M80's. Thanks for your input.