Switzerland
- Schlegel Stefan Swiss Jazz Orchestra
- Dani Felber Music Entertaiment
- Bollinger Willy Universal Brassquartett
- Reift Marc Slokar Quartett
- Keller Christian Universal Brassquartett
- Lassauer Karl Oper St. Gallen
- Huber Karl Oper Winterthur
- Bassetto Mirco MG Hörhausen
- Graf Christof BM Untereggen
- Rüegg Pius Stadtmusik Frauenfeld
- Barraut Jaques Orch. Swiss Romonde
- Ilg Ueli Stadtmusik Arbon
- Inäbnit H. Interlaken
- Gamper Andreas Liberty Brass Band
- Jäger Ch. Otmar Musik St.Gallen
- Kramer Gregor Stadtharm. Kreuzlingen
- Wüest Marcus Städt.Orchester Basel
- Oesch Susette Gallus Musikanten
- Keller Stephan MG Rorschacherberg
- Signer Andreas
- Schertenleib Martin
- Mosimann Thomas
- Eilinger Thomas
- Rindlisbacher Urs Kemmentaler Kibitzen
- Jean-Paul Papilloud Symphonisches Orch. Neuenburg
- Roth Stefan Liberty Brass Band
Belgium
- Vervyck Gaston Opera Gent
- Laplasse Hendrik Opera Brussels
- Devos Wim Opera Brügge
- Loose Wouter Opera Gent
Germany
- Königs Jürgen Slide
- Eggers Peter Passau
- Kraft A. Regensburg
- Hoffmann Ch. Münster
- Perschl Johann Munich
- Fink Achim Jazzm. Cologne
- Doleschal Hans Nuremberg
- Weichselbaumer Passau
- Kernspecht Werner Oper Essen
- Prochotta Dirk Oper Bochum
- Launhardt Uli Cologne Konzert Big Band
- Mönch Thomas MV Wollmatingen
- Schollmeyer H. Duisburg
- Ellerkamp Dirk
- Kraft Lars Henning
- Dieing Michael Westf. Philharmonie
- Musikhochschule Freiburg
- Thomas Richter Deutsche Oper Berlin
Finland
- Juutilainen Petri Polizeiorch.Helsinki
France
- Rapaude J. Opera Nizza
- Duwe Werner Opera Paris
United Kingdom
- Prof. Roger Argente Royal Phil. Orch. London
- Hughes Bob London Symphony Orch.
Japan
- Dolce musical instruments
Korea
- Il-Hwa Hwang
Netherlands
- Zuijderduin Albert Royal Orch.Den Haag
- de Vries Jenke Glenn Miller Orchestra
- van't Hof Coen
- Dyk van Ben Den Haag
- van Klink Peter Opera Enschede
- Musikhochschule Enschede
- Linderhof Martein
Norway
- Larson Leif Opera Stavanger
- Viktal Gaute
USA
- Malloy Andy Los Angeles
- Kugler Ken Los Angeles
- Sanders Bob Los Angeles
- Thatcher George Los Angeles
- Reichenbach Bill Los Angeles
- Bullok Los Angeles
- Flynn George New York Philharmonic
- Vernon Charles Chicago Symphonie Orch.
- Ingman Matt Freelance New York
- High School Chicago
Karl Lassauer
1. Trombone: Theater St.Gallen (CH)
Bob Hughes
Bass Trombone: London Symphony Orchestra (GB)
"I would like to congratulate you on the beautiful workmanship put into these trombones"
Peter van Klink
Bass Trombone: Theatre Enschede and professor at Music University Enschede (NL)
" Franz! This Contrabass Trombone is a Master Piece. Phantastic"
Stefan Schlegel
Swiss Jazz Orchestra und Freelance
www.stefanschlegel.com
Dani Felber
Music Entertainment
www.dani-felber.ch