I can’t speak for these avantone, but as for the original auratone which these are trying to get the market from,It’s hard to know why they became a standard, it just was, indeed they always purposely sounded like crap, but it was crap that the mixing engineer knew really well. Why would a studio buy that? simply because the other studio and the next one had them. And mixing engineers are freelancers, they are not tied to a specific studio. They work everywhere They just happened to know how a mix is “supposed” to sound in a mix cube.They will check if too much bass in their mix will cause the drivers to break up, they will check if the instruments is still all coming trough in crap systems. It’s not sufficient, they will go and listen trough, their car system, trough there laptop speakers, trough their phone, etc. but on the spot, in the studio, you would just periodically toggle in the shit box,to make sure your mix is still in check and is not only for people with a hifi system, that it will still work on most kitchen radios. But why this shit box and not an other shit box, only because it was expected from a studio to have a mix cube. Because it’s shit you are familiar with. Most of the time just one to check your mix in mono too.