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The Tetragon is based on the preamp found in the legendary Mesa/Boogie Mark IV amplifier.


The pedal uses a standard boss-style 9V power supply.  There is internal circuitry that boosts the input voltage to ±15V to give exceptional headroom and amp-like feel and response.

Controls include: Volume, Drive, Master, Bass, Middle, and Treble. There are three toggle switches for Bright, Fat, and Mid Boost.  The Fat toggle changes the center frequency of the mids from approximately 500Hz to 280Hz. Bright adds more high end to the Drive control and the Mid Boost adds more mid frequencies at the last gain stage before the graphic EQ.

The 5-band boost/cut graphic EQ has center frequencies at 80, 240, 750, 2200, and 6600 Hz. This is a gyrator-based EQ that runs at the equivalent of 30V for incredible headroom and transparency.


Each pedal uses a professionally assembled PCB and is proudly assembled by hand in Calgary, Alberta, Canada.

Other features include:

  -  Soft-touch relay true bypass for improved reliability

  -  Professional high quality 4-Layer FR4 PCB

  -  Powdercoated enclosure and UV Printed artwork

The end result is high quality pedals that sound amazing, are consistent from pedal-to-pedal.

Each pedal comes with a 1 year warranty on parts and labour. Note that the warranty does not cover damage due to using an improper power supply or other misuse. 

The price is $259US + shipping.

Shipping within Canada and the US is $20US.  Shipping to the UK, Western Europe, Australia, and Japan is approximately $60US.  For other regions, please inquire for shipping rates.

For US customers, you will not have to pay any import duties or tariffs. USPS will delivery the pedal to you once it passes through customs.

For customers outside of North America, please note that you will be responsible for any customs/import/VAT charges that your country levies on the pedal. 

Thank you and stay safe!

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