Our new Logarhythm 4 has been designed to give maximum output in a neat and compact unit.. We have retained the low radius (curve) of the Mk3 model but repositioned the chamber so that the capsule is nearer to the player's foot and angled up towards the point of impact. Because the acoustic chamber is now further forward we have cut away the extraneous material to make your Log lighter and also take up less room in your kit bag.