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Josef Klier Signature Mouthpiece M. Müller for Tenor Horn!
JK Exclusive mouthpieces stand out with large tonal volume, pure tuning, easy response, and precisely calculated resistance in cup design and backbore, ensuring good endurance for the player.
The personal sound concepts and wishes of a professional musician like Michael Müller can only be fulfilled with the greatest possible technical precision. That’s why Klier in Diespeck, Middle Franconia, uses computer-controlled CNC lathes to manufacture their JK mouthpieces. Only this production method allows the necessary series accuracy with tolerances in the micrometer range (thousandths of a millimeter) thanks to its high positioning precision.
Unique in the Mouthpiece Sector
The consistent embouchure and cup diameter of each series, as well as the exact and differentiated gradation, allow the musician to achieve any desired style without having to adjust their embouchure. A mouthpiece series with such precise and optimal design cannot be found in any other mouthpiece offering.
The Verdict of Professional Musician Michael Müller
"The different sound concepts of tenor horn and euphonium, as well as switching between the instruments, have occupied me for a long time. To address the nuances of this topic, I got in touch with JK. Thanks to their experience in mouthpiece manufacturing and the versatile possibilities of the custom shop, we were able to develop my own JK models that convince me in every respect...
The 9D-B M. Müller, with its heavier outer shape, has an easy response especially in the high register. This greatly benefits my endurance. Furthermore, I am thrilled by the full and balanced sound from the low to the high register. With this mouthpiece, I feel perfectly at home with the Egerländer Musikanten, Alpenblech, and at BrassTrail workshops."
About Michael Müller
Michael Müller, born in 1986 in Winterrieden, began his musical career with training at the vocational music school in Krumbach under Peter Seitz. He then studied euphonium at the University of the Arts Bern and the Lucerne School of Music.
After successfully completing a master's degree in music education, he graduated with distinction in 2014 with a second master's degree in performance. During his studies, he played in brass bands such as the BB Bürgermusik Luzern and the BB Berner Oberland.
Together with his partner Maria Sturm, Michael Müller publishes brass method books and literature for baritone, tenor horn, euphonium, and tuba in the established "BrassTrail" series.

Since 2012, Michael Müller has been a member of "Ernst Hutter & Die Egerländer Musikanten - The Original" and "The Small Egerländer Ensemble - The Original." Since 2015, he has enriched the seven-member brass band "Alpenblech" on tenor horn. He regularly works as an instructor at workshops in Germany, Austria, and Switzerland.
About Josef Klier Mouthpieces
The family business originated in Graslitz in the Sudetenland, a city considered the cradle of musical instrument making. This is where the development of the entire industry began. As early as 1669, 12 violin makers worked in Graslitz. By the outbreak of World War II, 300 companies employed a total of 3,000 trained musical instrument makers.
Mouthpieces by Josef Klier - A sound beginning!
Features
- Josef Klier Tenor Horn Mouthpiece
- JK Exclusive Custom Signature Series
- Signature Model "Exclusive" TH 9D-L M. Müller
- Bore size: 6.0 mm
- Rim diameter: 38.00 mm
- Cup diameter: 25.00 mm
- Cup shape: medium deep
- L-shank: 12.5 mm
- Silver-plated
- Made in Germany
Scope of delivery
- 1 x Klier Tenor Horn Mouthpiece Exclusive TH 9D-L M. Müller
Specification
- Product number 00102146
- Cup depth Mitteltief
- Instrument Tenorhorn
- Shaft Trombone Large (12.5 mm)
- Cup diameter 25
- Colour Silber
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A verification of the ratings has taken place as follows: Only customers who are registered in our online store and have actually purchased the product from us can submit a rating for the item in the customer account.
Variant Klier Tenor Horn Mouthpiece Exclusive TH 9D Michael Müller
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I use it on my Kühnl & Hoyer Bari...fits perfectly.
Variant Klier Tenor Horn Mouthpiece Exclusive TH 9D-B Michael Müller
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With kind regards
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Financing
ConsorsFinanz Finanzierung
- 6 to 72 months term
- 0% financing for 9,08 € per month
- More information on financing
| 3 Year warranty | |
| 30 Day Money Back | |
| Price Match Guarantee | |
| Over 2.000.000 satisfied customers |
The hotline is currently not manned. You can reach us again on Wednesday, 20.05.2026 at 09:30.
| Wednesday | 09:30 - 18:00 | |
| Thursday | 09:30 - 18:00 | |
| Friday | 09:30 - 18:00 | |
| Saturday | 09:30 - 13:30 | |
| Monday | Closed |
Different opening times |
| Tuesday | 09:30 - 18:00 |