Very simple 4HP Reverb Module based on the Accutronics Digi-Log-Reverb BTDR-2H

It has the standard controls for Reverb amount and Feedback and an additional Tone control to set the frequency of the audio being fed to the reverb. Additionally there is an OSC switch that will enable a feedback loop of the reverb signal. Depth could be also described as a “cathedral” switch increasing the size of the reverb. This is a very simple circuit that will give you short reverbs and a lot of noise and feedback madness. PCBs marked „V2“ have an input and output gain stage in order to reduce distortion and increase output levels as well as an improved Tone control. Additionally both switches have been changed to take effect when the switch is pushed downwards.


2 to 2.85 Seconds Reverb Time depending on the BTDR Type Tone Control “OSC” Switch for Feedback Loops “Depth” Reverb Size Control Wrong polarity protection 3U Eurorack module, 4 HP wide Power consumption: 65 mA at +12 V

The module consists of two boards:

Front PCB Panel Main PCB