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EarthQuaker Devices

Crimson Drive

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Brand: EarthQuaker Devices
The Crimson Drive is a cutting and dynamic overdrive designed around a single germanium transistor and vintage germanium diodes. It creates a very open tone with excellent harmonics and a pleasing raw grit that can’t be duplicated with more common FET or opamp based overdrives. With a simple twist of the gain control, the Crimson Drive can go from a gritty Rangemaster style treble boost to a rattling overdriven sound that is reminiscent a vintage plexi style amp at full bore. Works great with single coils as well as humbuckers and has excellent clean up with your guitars volume control.

Upgrades from V1 include:

• Added Tone control

• Vintage black glass OC139 germanium transistors and germanium diodes

• Lower noise floor and improved power filtering


4.37″ X 2.37″ X 1.75″ with knobs


A standard 9 volt DC power supply intended for musical instruments with a negative center 2.1mm barrel. We strongly recommend a high quality power supply with isolated outputs and good filtering to avoid unwanted noise. Will also run off a 9v battery for you olde tymee types.


Drive: Controls the amount of gain

Tone: Rolls off high end by turning counter clockwise

Level: Controls the output

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