Protecting your amp and guitar from dc... why?

Posted by ham_phist on Oct 14, 2015; 11:21pm
URL: http://guitar-fx-layouts.238.s1.nabble.com/Protecting-your-amp-and-guitar-from-dc-why-tp25206.html

Hey all, just a quick question. I've noticed in my reading that the caps right after the input and right before the outputs are to block dc voltage. Why is that necessary?  I know a guitars signal has both positive and negative cycles, making it ac (right?), but is dc harmful in any way?

Thanks to everyone for being cool!