Madbean Pedals Kompromat

WE ARE EXTREMELY EXCITED TO ANNOUNCE THE 'NEW FOR 2025' COLLABORATION WITH MADBEAN PEDALS! Fantastic DIY pedal projects, now available as full or partial Small Bear kits!

Our Partial Kits include the PCB/PCB Set and all parts needed for the project, except you supply your own enclosure and knobs. 

Our Full Kit includes the PCB/PCB Set, all the parts, a drilled enclosure and knobs. 

You can always check out the MadBean Forum for more info-- a great resource! MadBean Pedals Forum

Overview

The Kompromat takes elements from both the original Keeley® Compressor and Barber® Tone Press™ and combines them into a single hybrid project. These are, in turn, based on the classic Ross OTA compressor. Taking into account the current shortages and decreasing part availability, the Kompromat offers the option to use either the stock CA3080 or the more widely available LM13700 OTA depending on which you have at your disposal. You only need use one of these for the project.

Controls

• SUS: Sets the total compression level (and the threshold trigger and compression ratio).
• ATTACK: Sets the response time of the compression effect. CCW: fast attack, CW: slow attack.
• BLEND: CCW: dry only. CW: compression only. In between will mix the dry and compressed signals.
• CLIP: This control reduces the input to the compressor. Set CCW for single coils and turn up for hotter pickups like P-90’s or humbuckers to reduce any clipping of the compression.
• LVL: Effect output level.
• BIAS: Sets the balance of the two OTA inputs. See Notes for adjustment.

Kompromat Build Guide

Kompromat Schematic