The EarthQuaker Devices Aqueduct Eight Modulation Modes is an EarthQuaker Devices chorus pedal, currently around $199. Close alternatives include the Catalinbread Callisto MkII All-Analog Chorus and the Crazy Tube Circuits Memphis. It pairs well with the Marshall Super Bass and the 1976 Marshall 1959 Super Lead.
EarthQuaker Devices Aqueduct Eight Modulation Modes
EarthQuaker Devices · pedal
The EarthQuaker Devices Aqueduct is a pitch vibrato pedal from Akron, Ohio boutique manufacturer EarthQuaker Devices, delivering eight distinct pitch vibrato modes through a pure analog pitch modulation circuit. Unlike amplitude modulation tremolo, the Aqueduct creates pitch vibrato by modulating the actual pitch of the signal. Eight modes include Sine, Square, Triangle, Sample and Hold, Random, Sine Envelope, Square Envelope, and Opto for diverse vibrato waveforms.
What stands out
“The EarthQuaker Devices Aqueduct is a pitch vibrato pedal from Akron, Ohio boutique manufacturer EarthQuaker Devices, delivering eight distinct pitch vibrato modes through a pure analog pitch modulation circuit”
— from the listing
“, the Aqueduct creates pitch vibrato by modulating the actual pitch of the signal”
— from the listing
“Pure analog pitch modulation circuit delivers warm vibrato”
— from the reviews
“Eight modes include Sine, Square, Triangle, Sample and Hold, Random, Sine Envelope, Square Envelope, and Opto for diverse vibrato waveforms”
— from the listing
“Its standout weakness is the pitch-vibrato-specific function”
— from the community notes
Trade-offs
“In the signal chain vibrato sits after drive and before reverb”
— from the community notes
- pitch
- pitch vibrato
- vibrato
- envelope
- waveform characters
- warm
- full
- eight modes
Price updated Oct 24, 2026
Amps that pair well with the EarthQuaker Devices Aqueduct Eight Modulation Modes
Marshall Super Bass
Marshall
25% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (warm → bright)
Marshall Super Bass's bright balances out the warm tone
Comes later in the signal chain
1976 Marshall 1959 Super Lead
Marshall
24% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (warm → bright)
Where this leans warm, 1976 Marshall 1959 Super Lead answers back bright
Comes later in the signal chain
Laney Richter
Laney
tonal matchComes later in the signal chain
Laney Richter leans bright right where the warm tone needs it
Mesa Boogie Subway D-350
Mesa Boogie
tonal matchComes later in the signal chain
Run Mesa Boogie Subway D-350 after it and the warm edge settles into something more bright
PRS DG
PRS
tonal matchComes later in the signal chain
PRS DG's bright balances out the warm tone
Vox MV50 Brian May
Vox
tonal matchComes later in the signal chain
Run Vox MV50 Brian May after it and the warm edge settles into something more bright
Fuchs ODH
Fuchs
tonal matchComes later in the signal chain
Where this leans warm, Fuchs ODH answers back bright
Soldano SLO-30 2-Channel 30W 1x12 Combo
Soldano
tonal matchComes later in the signal chain
Soldano SLO-30 2-Channel 30W 1x12 Combo's bright balances out the warm tone
Pedals that stack with the EarthQuaker Devices Aqueduct Eight Modulation Modes
EarthQuaker Devices Chelsea
EarthQuaker Devices
24% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (warm → bright)
EarthQuaker Devices Chelsea leans bright right where the warm tone needs it
Comes earlier in the signal chain
Catalinbread Galileo
Catalinbread
24% matchfills a frequency gapFills in a frequency range the other side doesn't cover, instead of piling more onto what's already there. (warm → bright)
Catalinbread Galileo's bright balances out the warm tone
Comes earlier in the signal chain
Chase Bliss Automatone CXM 1978
Chase Bliss Audio
13% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Keep EarthQuaker Devices Aqueduct Eight Modulation Modes's modulated voice out front: Chase Bliss Automatone CXM 1978 goes after EarthQuaker Devices Aqueduct Eight Modulation Modes in the signal chain so its pristine voice doesn't muddy it — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Neunaber Wet Mono Reverb Pedal
pedal
13% matchsits in the right chain slotPlaced for where it does its job cleanly in the chain, not for a tonal interaction with the anchor.
Run Neunaber Wet Mono Reverb Pedal after EarthQuaker Devices Aqueduct Eight Modulation Modes in the signal chain, where it won't crowd EarthQuaker Devices Aqueduct Eight Modulation Modes — goes in the amp's FX loop (or last, into a clean amp)
Comes later in the signal chain
Alchemy Audio HBE Detox EQ
Alchemy Audio
tonal matchComes earlier in the signal chain
Run Alchemy Audio HBE Detox EQ after it and the warm edge settles into something more bright
CALIFORNIA WUB Continuum EQ Galaxy Man Edition
California Wub
tonal matchComes earlier in the signal chain
Run CALIFORNIA WUB Continuum EQ Galaxy Man Edition after it and the warm edge settles into something more bright
Free The Tone ARC-53M Audio Routing Controller
Free The Tone
tonal matchWhere this leans warm, Free The Tone ARC-53M Audio Routing Controller answers back bright
Friedman Gold-72 Wah
Friedman
tonal matchComes earlier in the signal chain
Friedman Gold-72 Wah belongs in front of EarthQuaker Devices Aqueduct Eight Modulation Modes, since a wah tracks picking dynamics best on the raw signal
Cheaper alternatives
TC Electronic Shaker Vibrato
TC Electronic
62% similarityShared character: vibrato, signal chain, overdrive
Marshall VT-1
Marshall
61% similarityShared character: vibrato, overdrive
TC Electronic Tailspin Vibrato
TC Electronic
59% similarityShared character: vibrato
Caroline Guitar Company Arigato
Caroline Guitar Company
59% similarityShared character: vibrato, signal chain, reverb
Behringer uv300
Behringer
58% similarityShared character: vibrato, reverb
Electro-Harmonix Eddy Vibrato/Chorus
Electro-Harmonix
43% similarityShared character: vibrato, warm
Boutique & premium upgrades
Subdecay Siren Pitch Vibrato
Subdecay
60% similarityShared character: vibrato, overdrive
Origin Effects MAGMA57 Amp Vibrato & Drive
Origin Effects
59% similarityShared character: wide range, vibrato, full
Carl Martin TremO'vibe
Carl Martin
87% similaritysimilar tone character
Similar charactersee all similar tone character →
Catalinbread Callisto MkII All-Analog Chorus
Catalinbread
63% similarityShared character: wide range, vibrato, signal chain
Crazy Tube Circuits Memphis
Crazy Tube Circuits
59% similarityShared character: vibrato, signal chain, reverb
JHS Emperor
JHS Pedals
56% similarityShared character: vibrato, warm, full
JHS Artificial Blonde
JHS Pedals
55% similarityShared character: vibrato
EarthQuaker Devices ERQ Aqueduct
EarthQuaker Devices
54% similarityShared character: wide range, vibrato
ZVEX Instant Lo-Fi Junky Vertical
Zvex
53% similarityShared character: vibrato
Questions people ask
What are good alternatives to the EarthQuaker Devices Aqueduct Eight Modulation Modes?+
The closest matches in character are the Catalinbread Callisto MkII All-Analog Chorus, the Crazy Tube Circuits Memphis, the JHS Emperor. Budget picks: TC Electronic Shaker Vibrato, Marshall VT-1, TC Electronic Tailspin Vibrato. Boutique upgrades: Subdecay Siren Pitch Vibrato, Origin Effects MAGMA57 Amp Vibrato & Drive, Carl Martin TremO'vibe.
What pairs well with the EarthQuaker Devices Aqueduct Eight Modulation Modes?+
Strong matches from rig and tone-complementarity evidence: Marshall Super Bass, 1976 Marshall 1959 Super Lead, Laney Richter — Marshall Super Bass's bright balances out the warm tone.
How much does the EarthQuaker Devices Aqueduct Eight Modulation Modes cost?+
Around $199 (live listing price, updated Oct 24, 2026).
Compare
- vs TC Electronic Shaker Mini Vibrato
- vs Carl Martin TremO'vibe
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