The Electro-Harmonix Holy Grail Max is an Electro-Harmonix reverb pedal, currently around $161.22. Close alternatives include the Mad Professor Silver Spring Reverb and the Subdecay Super Spring Theory Reverb. It pairs well with the Mesa Boogie Mark I and the Morgan MVP23 Combo.
Electro-Harmonix Holy Grail Max
Electro-Harmonix · pedal
The Electro-Harmonix Holy Grail Max expands on the original two-mode Holy Grail reverb with four voices: Room and Hall for natural, spacious ambience, Spring for the boingy, splashy character of a real spring tank, and Flerb, a flanged-reverb hybrid that adds a swirling, metallic modulation on top of the reverb trail for more unusual, textured ambient sounds. A simple Reverb mix knob and mode selector keep it easy to dial in despite the added versatility. It carries forward the same accurate, musical core voicing that made the original Holy Grail one of the most popular reverb pedals ever made, while adding real range beyond straightforward room and hall ambience.
- reverb
- spring
- mix
- simple
- natural
- delay
- spring reverb
- modulation
Good for
- Live
- Studio
Price updated Aug 27, 2026
Genres the Electro-Harmonix Holy Grail Max is commonly used in
- Ambient
- Post Rock
cited
Inferred from shared tonal signals, not a stated genre tag. - Shoegaze
cited
Inferred from shared tonal signals, not a stated genre tag. - Lo Fi
cited
Inferred from shared tonal signals, not a stated genre tag. - Rockabilly
cited
Inferred from shared tonal signals, not a stated genre tag.
Amps that pair well with the Electro-Harmonix Holy Grail Max
Mesa Boogie Mark I
Mesa Boogie
24% matchFeed the Mark I's honky, high-gain lead channel with the Holy Grail Max's natural spring reverb for ambience that stays musical instead of washing out that nasal midrange.
Morgan MVP23 Combo
Morgan
5% matchKeep Morgan MVP23 Combo's dynamic voice out front: Electro-Harmonix Holy Grail Max goes in Morgan MVP23 Combo's effects loop so its spring voice doesn't muddy it
Supro Royale 1x12 combo
Supro
5% matchRun Electro-Harmonix Holy Grail Max in Supro Royale 1x12 combo's effects loop, clear of Supro Royale 1x12 combo's own gain stage
Matchless 30/15 Reverb 30W 1x12" Combo
Matchless
5% matchKeep Electro-Harmonix Holy Grail Max in Matchless 30/15 Reverb 30W 1x12" Combo's effects loop, clear of Matchless 30/15 Reverb 30W 1x12" Combo's own gain stage
Vox Micro SuperBeetle Guitar Mini Stack
Vox
5% matchRun Electro-Harmonix Holy Grail Max in Vox Micro SuperBeetle Guitar Mini Stack's effects loop, clear of Vox Micro SuperBeetle Guitar Mini Stack's own gain stage
Supro Delta King 10 (1820RTB)
Supro
5% matchElectro-Harmonix Holy Grail Max's spring voice goes in Supro Delta King 10 (1820RTB)'s effects loop — it's not there to compete with Supro Delta King 10 (1820RTB)'s own edge of breakup character
Boss Dual Cube Bass LX
Boss
5% matchRun Electro-Harmonix Holy Grail Max in Boss Dual Cube Bass LX's effects loop, clear of Boss Dual Cube Bass LX's own gain stage
Engl Savage 60 MK II
Engl
5% matchKeep Electro-Harmonix Holy Grail Max in Engl Savage 60 MK II's effects loop, clear of Engl Savage 60 MK II's own gain stage
See all 12 amps that pair with the Electro-Harmonix Holy Grail Max →
Pedals that stack with the Electro-Harmonix Holy Grail Max
Ibanez Tube Screamer
Ibanez
34% matchThe Screamer's mid-forward boost feeds the Holy Grail Max's simple spring reverb a driven signal instead of a clean one, not really stacking gain with it.
Klon Centaur
Klon
32% matchPush the Holy Grail Max's simple, natural spring reverb with the Klon's clear midrange boost and the wash gets a brighter signal to swell into.
Electro-Harmonix Bad
Electro-Harmonix
22% matchRun the Bad's woolly, resonant phase sweep after the Holy Grail Max's natural spring reverb so the modulation colors the wash instead of the dry signal.
MXR M117R Flanger
MXR
22% matchRun the MXR Flanger's warm, spacious sweep after the Holy Grail Max's natural spring reverb so the modulation colors the wash instead of the dry signal.
Old Blood Noise Endeavors Flat Flange Shifter Device
Old Blood Noise Endeavors
7% matchKeep Electro-Harmonix Holy Grail Max after Old Blood Noise Endeavors Flat Flange Shifter Device in the signal chain, clear of Old Blood Noise Endeavors Flat Flange Shifter Device's own gain stage
EarthQuaker Devices Spatial Delivery V3
EarthQuaker Devices
7% matchKeep the Holy Grail Max after the Spatial Delivery — the funky envelope-filter sweep stays intact and the reverb adds natural spring decay behind it.
EarthQuaker Devices Pyramids V1 Stereo Flanging Device
EarthQuaker Devices
7% matchKeep EarthQuaker Devices Pyramids V1 Stereo Flanging Device's shimmer voice out front: Electro-Harmonix Holy Grail Max goes after EarthQuaker Devices Pyramids V1 Stereo Flanging Device in the signal chain so its spring voice doesn't muddy it
Mr. Black Downward Spiral
Mr Black
7% matchKeep Electro-Harmonix Holy Grail Max after Mr. Black Downward Spiral in the signal chain, clear of Mr. Black Downward Spiral's own gain stage
See all 25 pedals that pair with the Electro-Harmonix Holy Grail Max →
Cheaper alternatives
Electro-Harmonix Holy Grail Neo
Electro-Harmonix
83% similarity“compared to the full Holy Grail Max”
Keeley Hooke
Keeley
72% similarityShared character: tank, reverb, natural
TC Electronic Drip Spring Reverb
TC Electronic
70% similarityShared character: tank, reverb
Mooer SkyVerb
Mooer
70% similarityShared character: ambient, reverb, natural
Electro-Harmonix Holy Grail Nano
Electro-Harmonix
93% similaritysimilar tone character
Boutique & premium upgrades
Universal Audio Golden Reverberator
Universal Audio
73% similarityShared character: tank, ambient, mix
Crazy Tube Circuits White Whale V2
Crazy Tube Circuits
71% similarityShared character: tank, reverb, mix
Electro-Harmonix Oceans Abyss
Electro-Harmonix
71% similarityShared character: reverb, delay, ambient
Crazy Tube Circuits White Whale
Crazy Tube Circuits
70% similarityShared character: tank, reverb, modulation
Carl Martin Headroom
Carl Martin
93% similaritysimilar tone character
Fjord Fuzz FJ/ER
Fjord Fuzz
93% similaritysimilar tone character
Similar charactersee all similar tone character →
Mad Professor Silver Spring Reverb
Mad Professor
72% similarityShared character: tank, reverb, natural
Subdecay Super Spring Theory Reverb
Subdecay
72% similarityShared character: tank, reverb, true_bypass
Alexander Pedals SpaceXpander
Alexander Pedals
72% similarityShared character: tank, true_bypass, delay
Wampler Mini Faux Spring Reverb
Wampler
71% similarityShared character: tank, reverb, ambient
J. Rockett Boing
J Rockett
71% similarityShared character: tank, reverb
Meris Mercury X
Meris
71% similarityShared character: tank, ambient, reverb
See all alternatives to the Electro-Harmonix Holy Grail Max (cheaper + boutique) →
Questions people ask
What are good alternatives to the Electro-Harmonix Holy Grail Max?+
The closest matches in character are the Mad Professor Silver Spring Reverb, the Subdecay Super Spring Theory Reverb, the Alexander Pedals SpaceXpander. Budget picks: Electro-Harmonix Holy Grail Neo, Keeley Hooke, TC Electronic Drip Spring Reverb. Boutique upgrades: Universal Audio Golden Reverberator, Crazy Tube Circuits White Whale V2, Electro-Harmonix Oceans Abyss.
What pairs well with the Electro-Harmonix Holy Grail Max?+
Strong matches from rig and tone-complementarity evidence: Mesa Boogie Mark I, Morgan MVP23 Combo, Supro Royale 1x12 combo — Feed the Mark I's honky, high-gain lead channel with the Holy Grail Max's natural spring reverb for ambience that stays musical instead of washing out that nasal midrange..
How much does the Electro-Harmonix Holy Grail Max cost?+
Around $161.22 (live listing price, updated Aug 27, 2026).