Subject: Can you use multiple megaphones to create extremely loud sounds?

In one episode of 'The Simpsons', Bart goes on a field trip to the police 
station and finds lots of electronic megaphones on the wall. He places them one 
behind the 
other, in effect 'daisy chaining' them. The output of one megaphone is fed into 
the input of the next, and so on down the chain. When he speaks into the first 
one, the sound is amplified so much that it shatters windows throughout the 
town. How plausible is this scenario? I assume 
that once the output capacity of one megaphone is exceeded, it would simply 
blow the speaker, thus ending the 'chain'. Would it work with non-electronic 
megaphones?

Re: Can you use multiple megaphones to create extremely loud sounds?