The Ansuz D2 Power Switch Box look exactly like the X·TC model, but make no mistake, the step in performance from the X·TC to the D2 model is clear and easy to hear. This also applies if you compare the D2 to the A2 model. All Ansuz PowerSwitches represents each their quality level – there is a number of different noise reduction technologies at work depending on the type and extent of the intended noise cancellation – technologies that are hearable.