Red Dawn had a realistic detail?? 
Have you seen the videos of the bomb going off in Bali? Like that, a remarkably sharp and extremely short bark. Sometimes, outside followed by remarkable silence as everyone shuts up and tries to figure out what the heck just happened.
It’s not so much that the speakers can’t duplicate it, it’s that you don’t want to duplicate it since you risk temporarily or permanently damaging the audience’s hearing. It wouldn’t be difficult to install speakers loud enough to damage the movie audience’s hearing, but you still wouldn’t want to do it. The trick is for the movie to make the explosion sound “loud”, but not actually painful. And you generally want the audience to be able to hear the hero’s pithy catchphrase after the explosion rather than holding their bleeding ears and saying “What? What?”
The other thing to note is that explosions, and particularly high explosives, don’t typically produce those big angry red firey clouds you see on the television. Normally, when stuff blows up, it juts makes a big bang and a grey-white-brown cloud of dust and debris. Movie explosion effects are don’t by placing gasoline in a container on top of a small explosive charge which has the effect of first dispersing and then igniting the aerosoled fuel, resulting in a very dramatic explosion with little in the way of collateral effects or stray debris. Gasoline won’t ordinarily explode when ignited unless it is dispersed or superheated, and indeed, it doesn’t detonate like a high explosive but rapidly deflagrates (burns) to produce its effect.
Check out Insultingly Stupid Movie Physics for more detail on common incorrect effects in film, such as sparking bullets (bullets are generally plain lead or jacketed with copper, neither of which spark), or lasers (which don’t make noise when fired or display a visible path), and so forth. The Bad Astronomy Movie Page also has some bits on bad movie physics.
Pretty much any effect you see portrayed in mainstream films–and especially in a Michael Bay film–is utter bolsh. When you become a big name director with a $100M budget, set aside a few thousand to pay some science grad student, professional engineer, or technical expert to review your script and effects and suggest how they can be done right without compromising the story.
Stranger