The Electro-Harmonix Holy Grail Max is an Electro-Harmonix reverb pedal, currently around $165.19. Close alternatives include the Subdecay Super Spring Theory Reverb and the Caroline Guitar Company Meteore. It pairs well with the Marshall Plexi 1959SLP and the Dumble Overdrive Special Amp Head.

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.

What stands out

  • “Use-case wise it suits players who want Holy Grail reverb character with spring and Flerb modes for more variety”

    — from the community notes

  • “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-reve…”

    — from the listing

  • “a simple reverb mix knob and mode selector keep it easy to dial in despite the added versatility”

    — from the listing

  • “The Holy Grail Max delivers four reverb modes including the classic Holy Grail Room and Hall plus Spring and Flerb, giving players comprehensive reverb coverage from natural room through spring and flanged reverb in an expanded Holy Grail f…”

    — from the community notes

  • “Limitations: Simple Reverb mix-only control damping, or pre-delay found in more advanced reverb pedals”

    — from the reviews

  • reverb
  • spring
  • mix
  • simple
  • delay
  • spring reverb
  • modulation
  • metallic

Good for

  • Live
  • Studio
$165.19View on Reverb

Price updated Oct 24, 2026

Genres the Electro-Harmonix Holy Grail Max is commonly used in

  • Ambient
  • Post Rock
    citedInferred from shared tonal signals, not a stated genre tag.
  • Shoegaze
    citedInferred from shared tonal signals, not a stated genre tag.
  • Lo Fi
    citedInferred from shared tonal signals, not a stated genre tag.

Amps that pair well with the Electro-Harmonix Holy Grail Max

Marshall Plexi 1959SLP

amplifier

19% match

Into the Plexi's aggressive, saturated tube breakup, the Holy Grail Max's simple, natural spring reverb has a genuinely raw amp voice to swell into.

Comes earlier in the signal chain

Dumble Overdrive Special Amp Head

Dumble

18% match

Into the Dumble's responsive, transformer-driven blues breakup, the Holy Grail Max's simple, natural spring reverb has a genuinely legendary amp voice to swell into.

Comes earlier in the signal chain

Milkman Sound JG40 1x12 Combo

Milkman Sound

6% match

Put Electro-Harmonix Holy Grail Max in Milkman Sound JG40 1x12 Combo's effects loop, clear of Milkman Sound JG40 1x12 Combo's own gain stage

Comes earlier in the signal chain

Blackstar Super Fly BT

Blackstar

6% match

Run Electro-Harmonix Holy Grail Max in Blackstar Super Fly BT's effects loop, clear of Blackstar Super Fly BT's own gain stage

Comes earlier in the signal chain

Laney DBV410-4 Digbeth 4x10 Cabinet

Laney

6% match

Keep Electro-Harmonix Holy Grail Max in Laney DBV410-4 Digbeth 4x10 Cabinet's effects loop, clear of Laney DBV410-4 Digbeth 4x10 Cabinet's own gain stage

Comes earlier in the signal chain

Synergy SYN-20IR Combo

Synergy

6% match
$1499via Reverb

Put Electro-Harmonix Holy Grail Max in Synergy SYN-20IR Combo's effects loop, clear of Synergy SYN-20IR Combo's own gain stage

Comes earlier in the signal chain

Koch ST20/H

Koch

5% match
$962.18via Reverb

Run Electro-Harmonix Holy Grail Max in Koch ST20/H's effects loop, clear of Koch ST20/H's own gain stage

Comes earlier in the signal chain

Supro Airwave

Supro

5% match

Put Electro-Harmonix Holy Grail Max in Supro Airwave's effects loop, clear of Supro Airwave's own gain stage

Comes earlier in the signal chain

See all 10 amps that pair with the Electro-Harmonix Holy Grail Max →

Pedals that stack with the Electro-Harmonix Holy Grail Max

Ibanez Tube Screamer

Ibanez

19% match

The 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.

Comes earlier in the signal chain

Klon Centaur

Klon

18% match
$4000via Reverb

Push 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.

Comes earlier in the signal chain

MXR Phase 90

MXR

13% match
$89.99via Reverb

Run the Phase 90's classic sweep after the Holy Grail Max's simple, natural spring reverb and the modulation colors the decay directly.

Comes earlier in the signal chain

Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator

pedal

12% match

Run Hughes & Kettner Tube Rotosphere MKII The Analog Leslie Simulator after Electro-Harmonix Holy Grail Max in the signal chain, where it won't crowd Electro-Harmonix Holy Grail Max

Comes earlier in the signal chain

MXR Phase 95

MXR

7% match

Put Electro-Harmonix Holy Grail Max after MXR Phase 95 in the signal chain, where it won't crowd MXR Phase 95

Comes earlier in the signal chain

T-Rex Sweeper 2

T Rex

7% match
$78.18via Reverb

Put Electro-Harmonix Holy Grail Max after T-Rex Sweeper 2 in the signal chain, where it won't crowd T-Rex Sweeper 2

Comes earlier in the signal chain

Big Joe Stomp Box Company B-306

Big Joe Stomp Box Company

7% match
$119.95via Reverb

Keep Big Joe Stomp Box Company B-306's modulated voice out front: Electro-Harmonix Holy Grail Max goes after Big Joe Stomp Box Company B-306 in the signal chain so its spring voice doesn't muddy it

Comes earlier in the signal chain

Old Blood Noise Endeavors Visitor

Old Blood Noise Endeavors

7% match
$199via Reverb

Run Electro-Harmonix Holy Grail Max after Old Blood Noise Endeavors Visitor in the signal chain, where it won't crowd Old Blood Noise Endeavors Visitor

Comes earlier in the signal chain

See all 41 pedals that pair with the Electro-Harmonix Holy Grail Max →

Cheaper alternatives

Electro-Harmonix Holy Grail Neo

Electro-Harmonix

84% similarity
$106.28via Reverb

“compared to the full Holy Grail Max”

Electro-Harmonix Holy Stain

Electro-Harmonix

60% similarity
$130.49via Reverb

Shared character: reverb, ambient

Donner Verb Square

Donner

55% similarity
$61.68via Reverb

Shared character: reverb

Wampler Mini Faux Spring Reverb

Wampler

93% similarity
$138.63via Reverb

similar tone character

Electro-Harmonix Holy Grail Nano

Electro-Harmonix

92% similarity
$115.06via Reverb

similar tone character

Boutique & premium upgrades

Crazy Tube Circuits White Whale V2

Crazy Tube Circuits

62% similarity
$286.77via Reverb

Shared character: tank, reverb, mix

Crazy Tube Circuits White Whale

Crazy Tube Circuits

61% similarity
$286.77via Reverb

Shared character: tank, reverb, modulation

Fjord Fuzz FJ/ER

Fjord Fuzz

60% similarity
$249via Reverb

Shared character: tank, reverb

Benson Amps Tall Bird Plus

Benson Amps

59% similarity
$2386.31via Reverb

Shared character: tank, reverb

Source Audio True Spring

Source Audio

57% similarity
$231via Reverb

Shared character: tank, reverb

Universal Audio Golden Reverberator

Universal Audio

56% similarity
$329via Reverb

Shared character: tank, ambient, mix

Similar charactersee all similar tone character →

Subdecay Super Spring Theory Reverb

Subdecay

65% similarity
$180.22via Reverb

Shared character: tank, reverb, true bypass

Caroline Guitar Company Meteore

Caroline Guitar Company

60% similarity

Shared character: reverb, ambient

Catalinbread Topanga

Catalinbread

57% similarity
$178.49via Reverb

Shared character: reverb, mix

Laney Black Country Customs Secret Path Reverb

Laney

54% similarity
$150.18via Reverb

Shared character: tank, reverb, delay

NuX Atlantic

Nux

53% similarity

Shared character: reverb, delay, ambient

J. Rockett Boing

J Rockett

53% similarity
$180via Reverb

Shared character: tank, 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 Subdecay Super Spring Theory Reverb, the Caroline Guitar Company Meteore, the Catalinbread Topanga. Budget picks: Electro-Harmonix Holy Grail Neo, Electro-Harmonix Holy Stain, Donner Verb Square. Boutique upgrades: Crazy Tube Circuits White Whale V2, Crazy Tube Circuits White Whale, Fjord Fuzz FJ/ER.

What pairs well with the Electro-Harmonix Holy Grail Max?+

Strong matches from rig and tone-complementarity evidence: Marshall Plexi 1959SLP, Dumble Overdrive Special Amp Head, Milkman Sound JG40 1x12 Combo — Into the Plexi's aggressive, saturated tube breakup, the Holy Grail Max's simple, natural spring reverb has a genuinely raw amp voice to swell into..

How much does the Electro-Harmonix Holy Grail Max cost?+

Around $165.19 (live listing price, updated Oct 24, 2026).

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