Really odd question here, just go with me on this.
You have a small speaker, connected to a small amp. It's turned "on" but no sound is being played. (not that it's broke, you just aren't playing any music)
you bare a spot on the two speakers wires, touch and rub them together, will the speaker produce an audible sound?
Assume a very small amp, and very small speaker, on the order of laptop speakers. Say 10 watts.