The Earth Return Distortion module or ERD001 is a distortion unit, developed and produced by none other than Martin Howse, which throws up some incredibly dirty sounds that will appeal to any guitarists who likes the sound and feel of raw, gnarly distortion. This module is only being produced in a limited run of 40 units, which makes it even more desirable and exclusive.
This distortion module quite literally packs dirt, in that it features a box of earth collected from a forest floor. This earthen dirt is situated right in the circuit of the unit, and "control and audio signals to be distorted and amplified as they pass through the earth block."
This is one distortion module that takes the concept of earthy sound to a totally different level.