‘The Underground’Tube – Boost/Distortion pedal by Millipede FX employs a vacuum tube at its heart to bring a natural richness, shimmer and sustain to your tone. 

Now you are not limited only by the tones you can dial in with the controls and switches on-board, but you can physically change the tube itself to suit the sound!! The tube is socketed and can be swapped in and out and experimented with. For example a 12AT7/ECC81 is perfect for mid-gain applications, 12AX7/ECC83 for higher-gain and the 12AU7/ECC82 for all around performance.

‘The Underground’ takes its styling cues from the old-school tube amp heads of yesteryear and is fitted with ‘Gain’, ‘Tone’ and ‘Master Volume’ knobs on the side of the enclosure.  It also features both a capacitor and diode selector switches for various tone combinations.

The warm sound of a 12AU7 vacuum tube can take your sound from bluesy style boost right through to heavy, harmonic distortion!


  • Hammond 1590B Aluminium Enclosure – Dimensions: 4.4” L x 2.4” W x 1.25” H.

  • Includes 12AU7 - 9 pin tube

  • High Quality 1/4 Inch Input and Output Jacks.

  • 2.1mm 9V DC Power Jack (for use with ‘Boss’ style Wall Wart Power – not included).

  • High Quality 3PDT Footswitch with True Bypass Wiring.

  • High Quality Potentiometers and Control Knobs.

  • Diffused White effect LED. Blue LED to backlight tube.

The tube itself is backlit with a blue LED, while the effect engaged indicator LED is a diffused white LED.  The LED color combinations can be custom changed to suit your taste, please just let me know if you would like different LED colors.

Ships standard with a 12AU7 tube, but this can be substituted with a 12AT7 or 12AX7 depending on your needs.  Please contact me if you’d like an alternate tube.

The pedal is fitted with a 2.1mm 9V DC ‘Boss’ style Power Jack. (NOTE: There is no battery snap installed.)

Every pedal is individually hand made and assembled by me. No two pedals are alike. I hand wire each pedal, apply the spray paint and custom graphics by hand. There may be some small visual imperfections. However, each one is tested for sound and build quality, personally.

The Millipede FX pedals can be customized with different colors and graphics.

FOR EXAMPLE: Why not put your band’s logo, your favorite album or your pet’s photo on the pedal. You can contact me to discuss your preferences.

Finally, visit my Website for more photos, information and demos at:

Product Specs

Brand New (New)
Brand New items are sold by an authorized dealer or original builder and include all original packaging.learn more
Brand Millipede FX
Model Boost / Distortion - 'The Underground'
Finish Metal / Grey
Categories Overdrive and Boost
Year 2014
Made In Canada

great buffer, great price!!!

Paul B. - December 15, 2014

Fast shipping, great communication, great pedal. Awesome all the way 'round. Thanks!

Paul R. - October 04, 2014

GREAT COMMUNICATION and bent over backwards to help fulfill this order!

Jason W. - October 01, 2014

Another great looking pedal I can't wait to have on my board! Better yet, dealing directly with the source makes it that much more enjoyable!

Michael M. - September 27, 2014

Couldn't be happier. Check out their custom graphics! A+++ seller. Fast shipping too.

Nick P. - July 14, 2014

Accepted Payment Methods

Shipping Policy

Available for local pickup from Vancouver, Canada

Ships from Vancouver, Canada to:

Continental U.S.

Millipede FX is happy to ship anywhere in the world! Please contact me if you are located outside of North America for international shipping rates.

Our pedals are securely packaged in bubble wrap and shipping boxes. Domestic Canadian packages are sent via Canada Post’s Domestic Service, US packages are sent via Canada Post/USPS, while International Parcels are sent using Canada Post’s International Mail Service.

International Customers: Please allow one to three weeks for delivery – longer during holiday periods. Also, note that buyers are responsible for any Customs fees, taxes, tariffs or other duties incurred.

Tax Policies

Taxes are charged in the following regions either by the seller, per their tax policy, or by Reverb as a Marketplace Facilitator:

District of Columbia*
New Jersey*
New Mexico*
New York*
North Carolina*
North Dakota*
Rhode Island*
South Carolina*
South Dakota*
West Virginia*
*Marketplace Facilitator State. Reverb collects tax on the sellers behalf. Learn More

Return Policy

If you’re not happy, we’re not happy! Millipede FX wants you to love your pedal. If you don’t, please contact us within seven days of receipt of your pedal, (provided that your pedal is in its original package, and in the same condition as it was when posted to you) for a refund or exchange. Please NOTE, you are responsible for shipping charges.

Millipede FX pedals carry a limited six (6) month warranty covering faults in the electronic circuit, due to defective parts. The warranty does not cover the exterior (i.e. paint work, graphics, knobs etc) also, does not cover failure due to damage.

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Millipede FX - Custom Guitar Pedals

Vancouver, Canada
Joined: Nov 2013

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