Pancra85:
I am working on some sort of synth and want to add a speaker output but also a line out, and if I am using line out the speaker should be deactivated.
I was thinking that I can use this amplifier: http://makezine.com/images/09/CrackerboxAmp_Schem.pdf and have a switch on the OUT after the Master volume so it can switch between speaker and line out
Will that work ok? with no noise or problem at all?
Thanks!
You can get jack sockets with built-in switches for doing this sort of thing. Connect your speaker through the socket and when you plug something into the socket it gets disconnected.