The Midium

Dreadbox's description of the Dreadbox Lethargy 8-stage OTA phaser pedal


Lethargy derives from the greek word for forgetfulness, “Lethe”. It is a state of being drowsy and dull. The feeling of having little energy or of being unable or unwilling to do anything.


Dreadbox LETHARGY is an OTA-based Phase Shifter effect pedal suitable for fretted instruments and synthesizers, with eurorack patch compatibility.



Full Analog 8-Stage OTA Phase Shifter
2 Different LFO Waves
Wide Range LFO from several sec up to 110Hz
Great for Vibrato Effect
3 patch points for our modular fans



Mono OUT TS unbalanced 6.4mm audio jack

Mono IN TS unbalanced 6.4mm audio jack.Expects up to 2Vpp Input Levels

Balance between LFO amount and Manual control

Set the initial phase shift degrees, like you would control the Cutoff frequency of a filter

Set the amount of feedback; no feedback gets you a smooth vibrato effect

Choose between the 2 LFO waves

Set the LFO Rate from very (very!) slow up to FM

CMOS Bypass with soft touch switch






Inputs / Outputs
IN/OUT : TS Unbalanced 6.4mm jack
Manual / Rate / LFO Out : 3.5mm mini jack

Power Supply
9VDC BOSS style center pin negative 2.1mm (NOT INCLUDED)

Dimensions (cm)
14 x 10 x 5.6

Current Draw


Read the official owner's manual here.