PRaT stands for Pace, Rhythm and Timing, or simply known as “the toe tapping factor”. Some fast paced music requires a good PRaT otherwise the energy of the music is lost in the headphone/amp/system. If you want to test a system’s PRaT, try playing a fast Rock music (ie Muse) and see if you can get the energy from the music. Systems with slow pace, low PRaT will kill the energy and over mellow the presentation.