My understanding is that while the MRs from the current catalog (e.g., the 5178) are no longer clearly audible at a 10-meter distance, quite remarkably the sound of this new 5750P fades away only at 60 meters. Obviously, one way to view it is that a better/stronger chiming, with all the engineering that went into realizing it, also implies that the sound will be less "personal" ;-)