Cerulean Amp Overdrive / Marshall Bluesbreaker

OVERDRIVE

BOOSTER

The Cerulean Amp Overdrive is an updated version of the Marshall Bluesbreaker pedal, in production from 1991 to 1999. A legend in its own right, it was also the source circuit for a number of expensive boutique pedals, most notably the Analogman King of Tone, which is two Bluesbreakers in the same box with a few modifications. In 1995, Marshall moved production from England to Korea, and around this time they made some tweaks to the circuit, increasing the gain and reducing the bass. The Cerulean project has a switch to go between both modes so you can hear the differences. It also borrows the expanded clipping options from the King of Tone, allowing you to select either soft clipping (stock), hard clipping, or no clipping (boost mode).