Marketing.
Loud is not difficult, I spent ~£800 on the sound system in my living room, and I could have spent a lot less on my amp, yet it can go as loud as anyone finds comfortable without distorting or clipping, at a range of 18Hz-40KHz flat, the sub-bass can be felt through the floors and walls if what I'm playing through them has that range and everything through them is crystal clear. Loud and good sounding can be achieved for far less than what I spent as I was keen on a level of sub-bass that isn't often found outside of electronic music.
It's just a stereo system, there are many like it.
Most consumers are used to crappy speakers, those built into tvs, budget 5.1 systems and such. Massive floor speakers are not for sitting in small rooms, they're for vast music halls, live events and such filled with people all making noise which music needs to be reproduced over such that it still sounds good. The marketing trick there was to make you think that ordinarily to sound that good big speakers like that would be required which is a complete falsehood, in a typical living room you don't need much to eclipse your appetite for volume, nor do you need anything more than 25w or so to get that loud without distorting or clipping when paired with efficient speakers.
As I said, they use off the shelf components, overprice them and use marketing techniques like that, as salesmen they are certainly impressive, but compared to other products on the market it's overpriced snake oil.