I got the schematic of this from http://www.runoffgroove.com/ruby.html - I just wanted to make a really quick test amplifier and the Ruby amp is good for this. it's quite loud relative to its size.
if you want some power amplifiers with more power than this one check out the "Power Amplifier" stripboard layouts on my site. http://www.paulinthelab.com/search/label/Power%20Amplifiers
