Paul, "Dave Condom asks why do transformers matter in an amplifier?"
"Well Dave, once upon a time I drove my Silver Cross pram to Chicago to see a woman called Mrs Guts, she bred poodles and made their hair into wigs for North Korean orphans. Mrs Guts had a son called Fribbit and he had a thing for transformers especially those tightly wound type that could strangle emperor Ming before he had a chance to invade Earth and set fire to Mrs Thatcher."
"Well Dave, does that answer your question about how transformers matter in an amplifier?"