Crazy Tube Circuits

Crazy Tube Circuits Unobtanium Overdrive

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Two of the rarest pieces of gear in a single box!

Klon overdrives and Dumble amps are among the rarest pieces of gear out there.

The Crazy Tube Circuits Unobtanium gives you both sonic flavors in a dual, stackable overdrive!

The right side packs a reproduction of the Klon Centaur, delivering anything from a transparent boost to a high headroom overdrive.

A toggle switch provides two different voices: the stock clipping/compression or a modified one that enhances gain and headroom.

Another toggle lets you select between True Bypass and the original’s Buffered Bypass, which adds clarity.

The left side serves up two different Dumble emulations at the flick of a switch!

The Super Overdrive mode delivers a celebrated mid to high gain overdriven sound full of sweet overtones.

The Steel String Singer voice shines for clean and glassy tones with natural and transparent compression.

The design here reinterprets and streamlines the original’s controls through an Emphasis knob.

This knob affects the presence and the low end of the signal before it hits the drive stage.

The pedal also features a passive series FX loop to connect pedals between the two sections or use them as independent effects.


Crazy Tube Circuits Unobtanium Overdrive Pedal features:

• Two mythical circuits in a single box!

• Right side faithfully reproduces the classic Klon circuit.

• Klon side goes from transparent boost to high headroom overdrive.

• Select between True Bypass or the Klon's original Buffered Bypass.

• Select between stock clipping / compression or enhanced gain and headroom.

• Left side packs Dumble-style tones.

• Select between 2 distinct Dumble-style overdrive circuits.

• Dumble side goes from clean boost to sweet singing overdrive.

• Connect other pedals between the two sections via the FX Loop.

• Runs internally at 18V DC for increased headroom and tube-like performance.

• Power: 9V DC.

• Current Draw: 100mA.



Type Overdrive
Condition New
Power 9V DC
Current Draw 100mA
Power supply included No
Manufacturer Warranty 5 years
Shipping & Return


  • Free shipping within Canada.
  • Free shipping to the USA.
  • Free shipping on international orders over 399$.

    Visit the Shipping page for more infos.

Fast Delivery

  • Canada : 1 - 2 business days
  • USA : 1 - 2 business days
  • Rest of the world: 3 - 5 business days.

Hassle-Free Returns

You have 45 days to test your new gear.
If you choose to return it, we’ll send a full refund.
It’s that simple: no bogus restocking fees or charges.

Visit the Returns page for more infos.


Frequently Asked Questions

  • Q : Is this item in stock? +

    A : On product pages, you can find an availability status.

    Products with the mention 'In stock' are in stock and ready to ship.

    Products with the mention 'Out of stock' are not currently in stock.

    For out of stock products, you can ask to get notified as soon as the item is back in stock.

    Enter your email in the ‘Email me when available’ field and you’ll be kept in the loop.

  • Q : Where are you located? +

    A : We’re in Blainville, Quebec, Canada.

    Contact us to schedule an appointment if you’d like to meet.

  • Q : When will my order ship? +

    A : Orders placed before 2PM EST ship on the same business day.

    An update with tracking details will be sent shortly after purchase.

    (Please note: business days don’t include weekends and holidays)

  • Q : How much does shipping cost? +

    A : Shipping to Canada and the USA is free on most orders.

    Shipping to the rest of the world is free on orders over 399$US.

    Visit the Shipping page for more infos.

  • Q : What shipping method do you use? +

    A : We ship with UPS.

  • Q : What payment methods do you accept? +

    A : We accept credit cards and Paypal.

  • Q : Do you charge sales taxes to Canadians? +

    A : Canadian residents are asked to pay sales taxes:

    Alberta: 5%.

    British Columbia: 5%.

    Manitoba: 5%.

    New Brunswick: 15%.

    Newfoundland and Labrador: 15%.

    Northwest Territories: 5%.

    Nova Scotia: 15%.

    Nunavut: 5%.

    Ontario: 13%.

    Prince Edward Island: 15%.

    Quebec: 14.975%.

    Saskatchewan: 5%.

    Yukon: 5%.

  • Q : Are there import charges on orders shipped to Canada? +

    A : No. Canadian customers will not be charged import fees.

  • Q : Are there import charges on orders shipped to the USA? +

    A : No. USA residents will not be charged import fees.

  • Q : Are there import charges on International shipments? +

    A: Shipping prices do not include VAT or other import taxes.

    Customers outside of Canada and the USA are responsible for duties and taxes.

    Orders that come back to the shop as refused by the customer will be refunded minus shipping.

    Please track your shipment to be aware of customs processing and delivery attempts.

  • Q : Can you declare a lower value on customs documents? +

    A : We understand that import fees are an annoying part of international purchases.

    However, we cannot offer to declare a lower value on customs forms.

    Customers outside of Canada and the USA are responsible for any fees that may be charged by their government.


Customer Reviews

Based on 1 review

I’m quite impressed with this pedal. I am running it through a Supro 1696rt Black Magick Reverb and it sweetens it up nicely. Highly recommend this one.