The EarthQuaker Pyramids is a fully loaded stereo flanging device. It has eight distinct modes, five user-programmable presets, tap tempo with subdivisions, and a variable Mix control. It is built on the same DSP platform as EarthQuaker’s Avalanche Run.
Key Features
- Eight flanger modes, including Classic, Through-Zero, Barber Pole Up/Down, Step, and Random
- Five user-programmable presets, plus a Live mode
- Tap tempo with subdivisions, and Trigger Up/Down modes that re-trigger the effect on footswitch press
- Multifunction Modify control, behaviour depends on the selected mode
- Positive and negative Feedback, plus a variable Mix control
- True stereo I/O, including side-chain flanging via an external trigger source
Eight Modes, Built for Depth Not Just Width
- Classic mode delivers the jet-plane sound most players expect from a flanger.
- Through-Zero mode recreates the tape-style phase cancellation loved by studio engineers, and here the Modify control determines exactly where in the LFO cycle that cancellation lands.
- Barber Pole Up and Down deliver an endlessly rising or falling sweep, Step and Random push into more rhythmic and unpredictable territory
- Trigger Up/Down modes let you re-trigger the LFO cycle with the footswitch instead of running on a continuous cycle. This is useful for syncing the sweep to your playing rather than the clock.
- Step mode moves the sweep up and down in fixed increments rather than a smooth glide . A bit like a synthesizer’s sequencer stepping through notes rather than a traditional flanger.
- Random mode works the same way as Step, but instead of a predictable up-and-down pattern, each increment is chosen at random.
Controls
- Manual: Sets length of delay on the modulated signal. Can also be assigned to an expression pedal for real-time control.
- Rate: Sets how fast the LFO cycles. In Trigger Up or Trigger Down modes, this is what determines how quickly the effect rises or falls after each footswitch press.
- Width: Sets how wide a frequency range the LFO sweeps across.
- Mix: Select the balance between the modulated (wet) and original signal.
- Activate footswitch: This uses EarthQuaker’s Flexi-Switch relay-based true bypass, so you can choose between standard or momentary latching operation.
- Feedback: Adds regeneration to the modulated signal, intensifying the sweep.
- Rate & Tap toggle switch: Centred at Normal, your tapped tempo plays back exactly as tapped. Flip it to Slow and that tempo gets divided down for a more relaxed sweep; flip it to Fast and it’s multiplied up for something quicker.
- Modify: Does something different depending on which of the eight modes you’re in!
- Tap/Trigger footswitch: in six of the eight modes (Classic, Through-Zero, Barber Pole Up, Barber Pole Down, Step, Random) this sets your tap tempo. In Trigger Up and Trigger Down modes specifically, it works differently — each press directly triggers the effect rather than setting a tempo.
- Presets rotary: switches between Live mode and five onboard presets. The factory presets are EarthQuaker’s own picks, but nothing stops you overwriting them with your own settings.
- Mode rotary: selects which of the eight flanger modes is active.
Power
Runs on a standard 9V DC centre-negative supply. 460mA current draw.
Who Is This For
Worth a serious look if you want genuine depth from a flanger rather than a single fixed voice. The eight modes, presets, and true stereo I/O make this suited to players who want to programme and recall specific sweeps rather than dial in one sound and leave it there.
Watch The EarthQuaker Pyramids In Action
FAQs
It’s a stereo flanging device with eight distinct flanger modes, five user-programmable presets, tap tempo, and a variable Mix control, built on the same DSP platform as the Avalanche Run.
A standard 9V DC centre-negative supply. Required 460mA, so needs a good supply
True bypass.
Its function changes depending on which mode you’re in. In Classic mode it acts as a tone control; in Through-Zero mode it sets where in the LFO cycle the phase cancellation occurs.
Yes. Run separate instruments into the Left and Right inputs for two independent flanged signals, or use the stereo outputs for a wide, spacious single-source flange.


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