Cornerstone releases Colosseum dual overdrive with Klon and Blues Breaker channels

April 10, 2025 · 2 sources

Cornerstone has released the Colosseum, a dual overdrive pedal combining Klon and Blues Breaker style circuits, in a design shaped by polls of the company's followers¹². Delicious Audio reported the release on April 10, 2025¹; Gearnews had covered the pedal earlier, on July 5, 2023².

The Colosseum is "a dual overdrive pedal based on my interpretation of the Blues Breaker and Klon circuits," the builder wrote in notes published by Delicious Audio, which reports that the builder stresses these are not faithful clones but personal reinterpretations voiced after those pedals and modified for improved performance and interaction¹. Gearnews describes it as the result of a series of polls among Cornerstone's followers, "essentially voted into existence"².

The Blues Breaker side, on the right, has had its clipping diodes removed; Delicious Audio reports the builder says this, with tone control tweaks, addresses the low volume and dark tone associated with a classic Blues Breaker¹. It carries Tone, Gain and Volume controls plus a smaller Clean control taken from the Gladio, which the builder says restores touch sensitivity and the bottom end of the clean signal¹². The Klon side, on the left, uses 1N34A germanium diodes and adds a Clip blender knob that gradually brings in saturation from two hand-selected silicon diodes; Gearnews describes the mini-dial as moving from 100 percent germanium fully counterclockwise to 100 percent silicon fully clockwise¹². Both channels have their own Tone control¹.

A toggle switch swaps the order of the two channels, and four jacks on the back let each side be connected to a looper or another pedal placed between them¹². Gearnews reports each pedal is hand built in Italy². Delicious Audio gives no price; Gearnews lists an MSRP of GBP 319 and EUR 399, and a price of $307.00². No US list price in dollars is given as an MSRP in either report.