Many producers of mouthpieces use model designations, which provide only insufficient information about cup diameter, cup depth and rim contour. At an early stage, Roland Klier noticed the disadvantages of these model designations which resulted for the brass player looking for a mouthpiece.
In 1964, along with the Exclusive Line, he drafted a logical and easy-to-understand system of designation, which enabled the player to recognize all relevant data from the model number at first glance. In addition, he develops a revolutionary concept of combining cup, bore and back bore, allowing the usage of Klier mouthpieces in every musical style.
With the K and M series mouthpieces, the french horn player will be able to achieve different sound ideas with the same cup and rim diameter. The M series is distinguished by a brilliant sound with clear timbre. It is made possible by a more round and flat cup. In contrast, the somewhat deeper cone-shaped cup of the K- series supports a classic dark timbre. Furthermore the rims are more rounded. This way, K- and M- models help to meet the varying demands of the french horn player.