Cornerstone Colosseum Overdrive

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Cornerstone pays homage to the Bluesbreaker and Klon with the Colosseum!

The Colosseum is the outcome of a series of polls conducted within the Cornerstone community.

It's a dual overdrive pedal based on Cornerstone’s interpretation of the legendary Bluesbreaker and Klon circuits.

The Bluesbreaker side takes things to another level!

Cornerstone has fine-tuned the design to address the common issues that plague this classic circuit, such as low volume and dark tone.

Cornerstone also incorporated their signature Clean control, which adds clean signal on top of the overdriven signal for added versatility.

Increasing the Clean control also restores some bottom end, while enhancing touch sensitivity and pick attack response.

The Klon side remains faithful to the original, with one important modification: the Clip blender.

The Klon has earned a stellar reputation thanks to the use of two mythical 1N34A Germanium diodes.

The Colosseum utilizes the same diodes but also introduces a pair of hand-selected silicon diodes into the blend.

This feature introduces an entirely new Klon flavor to your setup, while still capturing the sound of the original. It's pure magic!


Looper lovers, unite!

At the rear, you'll find four jacks to connect each side of the pedal with your favorite looper.

You can use the sides independently or place other pedals in between them.


Cornerstone Colosseum Overdrive Pedal features:

• Combines two classic circuits: the Bluesbreaker and the Klon.

• Two independent channels with distinct vibes.

• Select channels individually or stack them together for even more versatility.

• Flip the order of the channels using the Channel toggle switch.

• Power: 9V DC.

• Current Draw: Less than 100mA.

• Dimensions: 4.69" x 3.70" x 1.50"



Type Overdrive
Condition New
Power 9V DC
Current Draw 100mA
Power supply included No
Manufacturer Warranty 2 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 3pm 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.