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Renwig Custom

Our product enables musicians to use their amplifier as an extension of their instrument giving them unparalleled control over their tone.

  • Stage Product In Development
  • Industry Electronics / Instrumentation
  • Location Whitewater, WI, USA
  • Currency USD
  • Founded May 2012
  • Employees 5
  • Website

Company Summary

Tube amps have been coveted for their rich, unique sound for 60 years. Current tube amps lack ability to change settings on the fly and sacrifice digital flexibility for tube quality. Our system is the best of both. Using a foot control that manipulates the parameters of the amp separate from the signal without degrading quality, our products enable musicians to craft real-time changes, unparalleled expression, and unprecedented tone control.


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    Brennon J Garthwait
    President & CEO

    Brennon holds two bachelor’s degrees, one in general business and the other in geography with an emphasis in environmental science specializing in GIS. He has a broad understanding of business concepts that have been tested both analytically and through application. Currently, Brennon works at the Walworth County Economic Development Alliance (WCEDA) coordinating membership and events, and working to help attract, grow, and retain businesses in W

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    David R Hartwig

    David holds a Bachelors’ degree in Physics with an emphasis in engineering. His education consists of, but is not limited to electronics, micro processing, and computer programming. For the past three years David has been researching acoustic and audio tube amp design, which has resulted in the completion of a variety class A tube amplifiers. Also, he has been playing and performing music for twelve years. His focus in engineering and experience

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    Evan W Preston

    Evan holds an Associate's Degree of Applied Science, specializing in studio recording and audio engineering. He gained valuable project management experience in the studio as an engineer, and has been a musician for 13 years, five of which as a professional. He currently performs professionally in two separate bands, and has always been comfortable in leadership roles. Within these two performing groups, Evan has headed efforts in social media


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    Erik W. Ibele
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    Dr. Robert Gruber

Previous Investors

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    UW-Whitewater (Silent)