The Keeley-modified DS-1ultra is for players who are dissatisfied with the limits of the standard Boss unit, and want to create a huge wall of tone. If you suffer from brittle, fizzy, frustrating distortion, this pedal is the cure you need!

In addition to gaining the benefit of Keeley's hi-fi components upgrades the DS-1ultra has increased maximum distortion, much lower noise and fuller, more powerful bass response.

One satisfied user said "This is not a DS-1 on steroids - it's a whole different pedal after Keeley works his magic"

A switch lets you select between the classic Keeley “Seeing Eye” sound and the “Ultra” setting which gives a fatter tone with slightly less distortion but more output.

As one part of the changes, a red LED, actually part of the new distortion circuit, is added in the "O" of "TONE" - this lights up as it creates distortion!

The Ultra comes fitted with new cool control knobs and the trademark Keeley bright blue LED.

• £122 with FREE UK delivery