What I would prefer, gents is to avoid a semantic debate about what the circuit I need is called, whether it will win "design of the year" or not nor whether its "pure" or "good enough" ...my original post is as clear as I can make it:
" I'm after a circuit that will get the most sound out of the speaker [3W 8ohm] without popping it and using the parts I already have, i.e. I don't wan't the complication of an op-amp etc - I'm not after fidelity or low distortion I want a loud noise to scare burglars "
" I'm after a circuit that will get the most sound out of the speaker [3W 8ohm] without popping it and using the parts I already have, i.e. I don't wan't the complication of an op-amp etc - I'm not after fidelity or low distortion I want a loud noise to scare burglars "