They don't test them because they know 99% of their users are sheeple/useless eaters. Only AV enthusiast know how to read the tech specs and charts.
The rest of the users just follow the herd off the cliff, blindly.
IMO they are saving money by taking advantage of general ignorance. They spend the money on Bose style marketing.
If you saw Beats/Bose on tv, and they said they were the best and most popular, well then it must be goodererest.
The craziest thing is: it works!
Now I know they say 50% of people are below the 100 IQ bellcurve, but I REFUSE to believe this is the best my species can do. I mean damn son, I guess it's true!
If it's a Dyson or Rainbow or Swiffer or Mary Kay, then it must be good.
But you will never see a professional cleaner use one!
It is a bit expensive and difficult, but well within the budget of nearly any company. *If* they could actually find a technician that knew what they were doing!!! Instead of the clowns they tend to hire...
The main reason you don't see retail companies throwing their subwoofers up on data-bass is because they would look horribly inadequate against even $200-300 DIY cones and an $280 nu3kDSP. Let alone something good like a HST-18, in an optimal box, powered with a Powersoft K20 or SpeakerPower 6k amp, or even a FP14k clone or CC-5500 for that matter!
JTR and DeepSea seem to be able to hang with the best.
But a lot of other subs can't...
A lot of the subs are simply too small, they are made for small rooms with WAF considerations.
They end up overpriced and underperforming, but they are small and pretty to look at I suppose.
I wouldn't recommend anybody use anything less than two 15's... unless your wife is standing right behind you with a frying pan and some visa cutting scissors. Is what it is I suppose!
In the DIY world a $600 subwoofer gets to the equivalent of a Velodyne DD-18+
In the DIY world, $4000 gets you 4-8 18's and a 6-20kW world-class amp.
The only downside is they tend to look ugly.