Warburton is very popular with studio musicians and big band players. *Due to a price revision, it currently costs a total of ¥46,970 to purchase a Warburton top and backbore. The inner rim diameter is slightly smaller than a Bach 5. The rim is flat and thick. The outer rim diameter feels similar to a Bach 5. Therefore, it has a soft feel on the mouth and is designed to be less painful and less tiring even with hard pressing. The shallow V-cup is somewhere between an E and an F in depth. It has a slightly bright and rich sound. It feels like the vibrations within the cup efficiently transmit to the instrument. The backbore is #4, and because it's a bit tight, high notes are easier to play and more stable.