@deep_333 What you just stated to @m-db is marketing hyperbole without any basis in reality. The right term is powerful bass. Powerful bass requires the ability to move a large volume of air in a controlled fashion. This generally means large or multiple drivers with powerful amplifiers that have extremely low output impedances. Most importantly it takes enclosures that do not resonate, rattle or shake. Servo drives are an excuse for poor and undersized drivers in crappy enclosures.
@mijostyn , I think the nay saying is propagated by some competitor brands who are disgruntled because they can't step over a patent (making you all believe it's mostly marketing hyperbole). In the world of control systems, there is something called a free lunch. In this audio world, it could compensate for a poor driver/enclosure design. But, if the latter is not compromised, it can rise above the rest. Call Rythmik's founder (he's a EE) and have a nerd talk with him. He'll put the EE slant on it and describe it to you.
Get this book off amazon if you would like to read a bit. If it looks like hieroglyphics from time to time, it could mean that you are missing some pre-requisite.