The Logarhythm mk3 - Stompingly good ... The new Mk3 Log is a significant development on the Mk2 model. They created a much smoother radius (curve) on the stomping area to facilitate ease of use and to avoid any muscular strain when being played for long periods. They also greatly improved the "gain" or output level of the unit by reorienting the acoustic chamber. The Mk3 Logarhythm is designed so that you can get softer or louder dynamic by stamping your foot on the left or right of the stomping area respectively. It is also possible to use both feet on this unit. As with all our most recent models the Mk3 Log includes a Neutrik output socket for secure and trouble-free connection.