I am a 4th year electrical engineering student and have always wanted to begin building my own amplifiers. Yet time hasn't really allowed this. But I now have a project for my power electronics class in which I have to choose an application to design a switched mode power supply. I feel that I can finally begin.

     I want to design a general SMPS for use in practice amps up to around 60W. What would be some general specs I could use for the output of my power supply that would have the best chance of working on an amp I build in the future? Also, what other things should I keep in mind that I might not know about?

I appreciate any help I can get.