The Dickinson D1 is an all-valve overdrive pedal from Dickinson, a maker better known for other lines. Where most overdrive pedals get their character from transistors, op-amps and diodes, the D1 uses real tubes in its circuit, the same kind of valves found inside a guitar amplifier. That puts it in a different family from the familiar overdrive pedals most players start with, and closer to the territory of boost and preamp designs1.
What it does
MusicRadar's review frames the D1 not as a drive pedal that replaces an amp's own distortion, but as a pedal that works with an amplifier to extend it. Their overall verdict1:
"An amp expander/booster of the highest order."
Read that way, the D1's job is to push an amp harder, adding the kind of drive and lift a player would otherwise get from turning the amplifier up. Players comparing it against conventional drive boxes such as those covered in Boss SD-1 vs Ibanez TS9 Tube Screamer should treat it as a different tool: a valve-driven expander for an amp rather than a standalone distortion source. For heavier sounds built entirely in a pedal, distortion pedals and fuzz pedals occupy that other role.
A note on the name
The D1 name is shared: Dolamo also sells a D-1 Compressor, a compression pedal with no connection to Dickinson's all-valve overdrive2. The two are different products from different makers, and searches for "D1 pedal" turn up both.
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Questions
What is the Dickinson D1?
The Dickinson D1 is an all-valve overdrive pedal, meaning its circuit uses real tubes rather than solid-state components. MusicRadar describes it as an amp expander and booster of the highest order, placing it in the camp of pedals that push an amplifier rather than replace its distortion. It sits alongside conventional overdrive, boost and preamp designs.
How does the D1 differ from a normal overdrive pedal?
Most overdrive pedals use transistors, op-amps or diodes to shape clipping. The D1 instead uses valves, the same kind of tubes found in amplifiers. MusicRadar frames it as an amp expander and booster, so its role is to drive and extend what an amplifier already does, closer in spirit to a boost or preamp pedal than a standard drive box.
Sources (2)
- Dickinson D1 Overdrive Pedal review, MusicRadar, 2015-02-23
- D-1 Compressor by Dolamo, RockBoard PedalPedia, 2026