User customizable distortion

Nijel is a 4 HP distortion module that lets you change its character by plugging in components like diodes, capacitors or resistors directly to the front panel. Assembled modules and DIY kits come with a set of small components for experimentation. A set of preset cartridges is sold separately, which gives you instant access to a variety of sounds. The preset cards are also compatible with the Neutral Labs Scrat customisable multimode filter.

https://neutral-labs.com/nijel