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Most French horns being played in the U.S. are based on one of two well-known designs. They are either Kruspe-style horns or Geyer-style horns. In Europe, the Geyer-style is sometimes called Knopf-style.

Sound influenced by design

Although a French horn’s sound is most dependent on the mental concept that the player has, there are some general characteristics of each of these two designs. For example, the Geyer-style horn is usually described as brighter, warmer, and more compact. The Kruspe-style horn is usually described as darker, cooler, and broader.

Geyer-style horns are best known for having been played in Chicago and Boston. Kruspe-style horns, especially the Conn 8D, are best known for having been played in Cleveland, New York, and Los Angeles. Players in other parts of the U.S. have traditionally used either one of these two horn designs and are often used in mixed sections.

The Geyer-style horn

The Geyer-style horn traditionally has a smaller, medium-sized bell and bell throat. This smaller bell throat is most of the reason for its more compact sound but its warmer sound is usually attributed to its brass composition and lighter weight. It is usually played off the knee with the player holding it in the air, not touching the body.

The Kruspe-style horn

The Kruspe-style horn traditionally has a larger bell and bell throat. This larger bell throat is most of the reason for its broader, darker sound but its heavier weight and nickel-silver composition also adds to its darker sound, especially in softer passages. It is usually played on the knee, touching the body and that position dampens its resonance a bit.

Thumb triggers

Unrelated to tone color is the difference in the thumb trigger design. The Geyer-style horn uses a trigger that pushes a long rod to change the Bb flat valve, which is found farther away from the player, inline with the other valves. This is said to provide smoother slurs, but causes more delay in moving the trigger quickly.

The Kruspe-style horn has a trigger that works a Bb valve that is closer to the player’s thumb. Its convenient placement makes it slightly quicker and more reliable, but it does not enhance slurring like the inline Geyer-style valve does.

Common examples

The most common examples of the Geyer-style horn in the U.S. are the Yamaha YHR667 and the Conn 10D. The most common examples of the Kruspe-style horn are the Conn 8D, the Holton H-179, and the Yamaha YHR668.

Many European horns are also based on one of these two designs but other designs and variations do exist such as the Alexander 103 from Germany and the Paxman horns from England.