Thinking about your son blasting at full volume and then our conversation about our old systems....
I wasn't into sound equipment for its own sake until college, and even then, I learned about and messed with rigs or did installs for large venues. So I never knew what kind of amp that Pioneer system had because I didn't pay attention. I only remember that "blasting at full volume" was not a realistic option. It was frickin' LOUD at a quarter volume, and for casual listening, even if I wanted to "blast," I usually kept it lower than that. At around a quarter volume, it started to get painful, and I was never into that.
Plus, I'm pretty sure that if I'd turned it up more it would've just distorted and possibly blew those speakers. That amp seemed way overpowered for a system like that. I wonder how many watts that thing was pushing.