Well, as strange as it might seem to say this, an exploud can only get so loud before it damages its own vocal cords. Some musicians have reported that having exploud be higher up (standing on a platform, for example) improves the sound, but really, the scientific answer is literally to get more than one exploud. The more exploud, the more speakers, which in turn means more sound dispersion.
Putting it another way, sound is, in extreme laymen’s terms, air pressure. Imagine a perfectly still pool of water. Sound is like sticking your hand in and creating a wave. If you have only one hand stirring the water, your wave will only go so far, and it will only be so strong once it reaches the other side of the pool. However, if you stick both of your hands into the pool and if your friends stick their hands in, all of you together can create a wave strong enough to splash against the other end without a problem. In the same sense, only one exploud can only stir the air so much, but more than one can create extraordinarily powerful sound waves.
Of course, if you have more than one exploud, you risk damaging not only the structural integrity of your neighbors’ house but also the structural integrity of your own house and the well-being of your eardrums, never mind the fact that it could get you in trouble with your local law enforcement on charges of destruction of private property and disturbance of the peace. Honestly, the only reason why I’m telling you any of this is because it’s technically not illegal to be in possession of more than one exploud … and, all right, because I’m hoping you’ll film this. Just a little bit.
And I, meanwhile, refuse to claim any involvement. —LH
The Pokédex According to Bill 