Most high end audio products do not have tone controls. Any additional circuitry introduces more problems than it solves. I have proven this over and over the last fifty years. @mahgister +1. Your components are made to reproduce sound as best as they can for there price point. It is more effective to fix the problem not try to deal with the symptoms, typically the room or components that are not synergistic.
Perhaps high end sound is not the objective… then, no problem get an equalizer or equipment with tone controls. I don’t think I have owned a component with tone controls or used an equalizer (I have tried them) for forty years.