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 vo…

Audio out and speaker

system October 28, 2012, 9:39pm 8

Find a jack that will disconnect the amplifier when you insert your line-out phone.

Pretty common.