Detail 01
Eight modulation modes
The Mode switch selects distinct waveform and envelope combinations rather than a single vibrato character.
Product detailSKU #1500000223889
EarthQuaker DevicesAqueduct Vibrato Effects Pedal
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Independent shopping perspective
The Korena take
Aqueduct is a pitch-modulation pedal with eight mode choices, ranging from smooth sine movement and sharper triangle bends to abrupt square transitions and randomized pitch shifts. Rate and Depth set the motion, while the envelope modes make the effect respond to pick attack. Env D changes modulation intensity, Env R changes speed, and Env P makes pitch movement attack-sensitive with a wet/dry mix. Flexi-Switching also lets you hold the footswitch for temporary bursts or tap it for standard on/off use.
Strong match
Who this is for
- Creating pitch movement from subtle sine vibrato through abrupt square-wave trills and randomized bends.
- Using pick attack to control vibrato depth, vibrato speed, or pitch movement in envelope modes.
- Bringing an effect in briefly with the footswitch, then releasing it to bypass.
Consider the trade-offs
When to look elsewhere
- Running from voltages higher than 9V.
- Unpowered signal paths; the relay-based switching requires power to pass signal.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Env P Depth control
In Env P, Depth is a wet/dry mix: fully counterclockwise is dry, noon is 50/50, and higher settings fade the dry signal.
Detail 03
68mA current draw
Allow at least 68mA from the pedal's 9V DC supply.
Detail 04
2.52 x 2.24 x 4.61 inches; 0.82 weight
These measurements define the pedal's physical footprint and listed weight.
Final check
Know before you order
- 01Use a standard 9V DC supply with a 2.1mm negative-center barrel; do not use higher voltages.
- 02For envelope modes, place Aqueduct first in the signal chain and/or before effects that add volume or gain.
- 03The envelope modes were designed for low- to medium-output pickups; added output makes them respond at lower settings and less dynamically.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What is the difference between latching and momentary switching?
Tap the footswitch to turn the effect on or off. Hold it down for momentary use; releasing it bypasses the effect.
02What does pick attack control in the envelope modes?
Env D controls modulation depth, Env R controls modulation rate, and Env P controls pitch movement from your attack.
03Can Aqueduct run above 9V?
No. It is intended for a standard 9V DC supply, and higher voltages should not be used.
04What is special about Env P?
It uses pick attack rather than an LFO for frequency modulation and is the only mode with a wet/dry mix control.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsConnections & power
- Input Impedance
- 1 mohms
- Output Impedance
- <10 kohms
2 detailsSize & weight
- Dimensions Wxhxd
- 2.52 inch x 2.24 inch x 4.61 inch
- Weight
- 0.82
1 detailsOther
- Current Draw
- 68mA
