what is diff: Class "A", "A/B", and "B"


I am confused as to the meaning of the various categories of amps/pre-amps. Is a class A necessarily better than a class a/b or c etc. Would someone care to briefly list some of the brands that fall in these categories and why?
I know, it's a small question.
thanks,
jb
joeb

Showing 2 responses by supertrain_196038ed

I have a reciever with a class "G" rating. What does a class "G" do differently from "A"-"A/B"-ect? I would appreciate any info.
It is indeed Hitachi I have. Is this a good thing? Apparently it didn't do so well, or was it not cost effective? Please forgive my ignorance, I've had this thing for twenty years + or - and I've never had any info about it.