About Us

KSJ is an audio company based in Montreal, Canada. We hand build high quality audio electronics for mixing and mastering studios.

You might notice we have a slight emphasis on creating designs that use rotary switches, fine gain adjustments and use low tolerance components. Whether you are in a Mixing or Mastering setting, we believe this is important in the modern age. 

At KSJ, we have always believed that the finest tools should possess the precision required for seamless recallability—a fundamental aspect of the modern workflow that involves working on multiple projects and switching between sessions.

An elegant design should excel in delivering exceptional sound, in a stepped design, each of the meticulously chosen frequencies or settings allows that position to offer something beautiful and repeatable. The "limitations" of a stepped design prove invaluable in precisely dialing in settings and accurately comparing two potential positions.


Our mission:
"KSJ Audio: Embracing the heritage of classic designs and circuits, we channel their essence to create modern boutique audio electronics, elevating the art of sound. Hand-built with uncompromising quality, we make sonic excellence attainable for all."