What are the patented technologies of DT speakers?

Including "pre-focusing bipolar array" technology, "BDSS balanced double-folded ring" unit technology, linear response waveguide phase plug, source bass module and intelligent bass control system, ingenious application of passive bass unit, XTDD ultra-thin bass unit, asymmetric unit array and many other advanced patented technologies, D.T. products stand out in the market and bring unusual and wonderful enjoyment to the discerning ears and eyes of the public. These technologies will be applied to all products by d.t.