On November 9th, 1918 both Philipp Scheidemann and Karl Liebknecht made their proclamations (see Wikipedia). In many TV documentaries one can see a huge crowd of thousands of people listening. According to many sources, people have been demonstrating "between the Berlin Palace and the Reichstag". It may be worth noting that these two places are ~ 3 km apart, so it would take a really huge crowd of people to fill the space or the street in between them.
So assuming a demonstrating crowd of several thousands of people in either place, Scheidemann was said to have spontaneously left a lunch table in the Reichstag to open a window on the 2nd floor of the Reichstag building and speak to the public.
All pictures and films do not show him using a microphone and a public address system (loudspeakers) or not even a megaphone (not sure if this would have existed already in 1918). So how would a demonstrating crowd of some thousand people listen to one speaker who is not known to be given a speech upfront. How could he ever have gained the people's attention, purely from a technical perspective?
To some extend, the same question is valid for Karl Liebknecht who made his proclamation from the roof of a vehicle close to the Berlin Palace, which sounds slightly more realistic, yet in such a setup, it will also only be a minority of the crowd being able to listen.
