Its been a week since I am trying to simulate in LTSpice a simple amplifier using a transformer with CFB output stage. My outcomes so far are inconclusive as far as the output level and distortion is concerned. In general it seems that lower levels of CFB produce more power and less distortion which is the opposite of what I was expecting. Moreover, what is a normal level for a CFB amplifier I found citations for 12,5%, in another article about Williamson 100w I found 14db. I am really confused, any help?