audio equipment design and manufacture - jens jungkurth and john klett

FlexiGuy (FG500) - Mic/Line/Instrument Preamplifier:

FG500 Flexiguy
Flexiguy FG500 Mic/Line/Inst Preamp


CurvOmatic (FT501) - Resonant LP / HP Filter Set with Bax Tone Tipper:

Ft501 CurvOmatic
CurvOmatic FT501 Resonant Filters + Tone Tip



inquiries or requests - send email to


The mission at NonLinearAudio is to distill what we like in to new gear that we can use ourselves and share with the world... it's not about making another rendition or clone of a common "classic". It's about making truly useful creative analog audio hardware tools with purpose.

NonLinearAudio is the outgrowth of creative technical audio design concepts and efforts from Jens Jungkurth (Eisen Audio, LLC) and John Klett (Tech Mecca, Inc.).

NonLinearAudio products are manufactured in Brooklyn, New York.


all site content copyright john klett 2011-2014