I specialize in clarinet repairs for professional clarinetists, accomplished non-professionals and students.  I also work on instruments for the New York Philharmonic and for music schools such as The Juilliard School, Yale College of Music, Mannes College of Music, NYU, UMass, and University of Wisconsin/Milwaukee.

When I was in school, and even when I began performing professionally, it wasn't until I brought my clarinets to Mark Jacobi for a repair appointment that I realized having a true expert work on my instruments makes an enormous difference. I went to Mark Jacobi in Philadelphia not because my instruments were broken, but because I had been hearing for years that he can work wonders on any instrument he touches. The clarinets that I had Mark Jacobi work on were actually brand new and I liked them very much already, so I was curious as to how they could be improved. After my first appointment, it immediately became apparent that my instruments - and I - had achieved a sense of comfort and freedom from his work that I never thought was possible. I was blown away by the tactile response from the newly-customized keywork, the ease of sound production, the improved resonance and intonation, and so many other aspects that are integral to leading a successful career in music. Mark Jacobi opened up this new world of possibility for me, and I continue to be astounded by his work and the vast wisdom that he brings to specialized instrument repair.