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Electro-Harmonix Holy Grail Max

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$154.00 to $185.10 Price Tier: Standard

4.5 (26)

5 Reviews

Find out who is using Electro-Harmonix Holy Grail Max

13 community setups

28 wishlisted

114 saved

Page last updated Jul 02, 2026

Pricing and availability

We compare 600+ stores and found this item at 9 stores. Prices updated July 2, 2026.

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Reviews

Price

5.0 (9)

$185.10

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5.0 (1)

$185.10

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4.3 (61)

$185.10

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5.0 (21)

$168.06 43 available New

$110.80 13 available Used

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4.0 (8)

$185.10

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$185.10

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$185.10

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4.7 (33)

$155.00 $154.00 $1.00 · All time low

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£145.00

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Average Price: $172

Standard/Professional

$100

$276+

Price Tier

In the Reverb Effects Pedals category, Electro-Harmonix Holy Grail Max is priced in the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

Budget

Standard

High-end

Price History

Based on price data from 6 merchants for "Electro-Harmonix Holy Grail Max". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Electro-Harmonix Holy Grail Max is the crown jewel of reverb effects pedals, delivering four top-tier, studio-grade reverbs in a robust stompbox format. This gear is smartly designed to help you effortlessly dial in the sound you desire. The circuit features a dry path/Blend control configuration, ensuring no level change when you adjust your wet/dry mix. The Time knob allows you to fine-tune the decay of your reverb, with longer settings offering an almost psychedelic experience, especially in Reverse mode.

This pedal is not just a tool, it's an inspiration, a creative companion that feeds your musical appetite. Whether you're playing at a gig, recording in the studio, or simply jamming at home, the Holy Grail Max's vibrant, detailed reverbs can be used with all your amps, making it an indispensable part of any guitarist's arsenal.

Key Features:

Four studio-grade reverbs: Spring, Hall, Plate, and Reverse
Dry path and Blend control for consistent level, regardless of wet/dry mix
Pure analog signal path from input to output
Multi-function Time control for customized decay or reverse time
True bypass for maximum signal path integrity
Compact, rugged die-cast chassis
Powered by the included 9.6DC-200 power supply (not battery powered)

Owner's manual

Electro-Harmonix Holy Grail Max User Manual

Product specs

Pedal Type	Reverb
Analog/Digital	Digital
Effects	Spring, Hall, Plate, Reverse
Max Delay Time	30 seconds
Inputs	1 x 1/4"
Outputs	1 x 1/4"
Bypass Switching	True Bypass
Power Source	9V DC power supply (included)
Power Usage	80mA
Height	2.25"
Width	4"
Depth	4.75"

FAQs

What types of reverb effects does the Electro-Harmonix Holy Grail Max offer?: The Electro-Harmonix Holy Grail Max provides four reverb effects: Spring, Hall, Plate, and Reverse. These options allow for a wide range of reverb sounds suitable for various musical styles.
Does the Electro-Harmonix Holy Grail Max support true bypass switching?: Yes, the Electro-Harmonix Holy Grail Max features true bypass switching, ensuring that your guitar signal remains unaffected when the pedal is not engaged.
What power supply is required for the Electro-Harmonix Holy Grail Max?: The Electro-Harmonix Holy Grail Max requires a 9V DC power supply, which is included with the pedal.
Is the Electro-Harmonix Holy Grail Max suitable for use with both guitar and bass?: Yes, the Electro-Harmonix Holy Grail Max can be used with both guitar and bass, offering versatile reverb effects for different instruments.
How does the Reverse reverb mode on the Holy Grail Max differ from traditional reverb sounds?: The Reverse reverb mode on the Holy Grail Max creates a unique backward reverb effect, which can add an experimental and atmospheric dimension to your sound, unlike traditional reverb types.

Videos

Add video

EHX

Electro-Harmonix Holy Grail Max Reverb Pedal

EHX

Electro-Harmonix Holy Grail Max

Prymaxe

16 Reverse Reverbs & Delays (into a Death By Audio Fuzz War) in 6 minutes - High-Speed Shootout

The Pedal Bored

Electro-Harmonix Holy Grail Max Reverb | Reverb Demo Video

Reverb

Strings Quick Demo : Electro-Harmonix Holy Grail Vs Holy Grail Neo VS Holy Grail Max

Strings Shop

EHX East River Drive, Bad Stone and Holy Grail Max demo | PMT

PMTVUK

Pedal Demo: Electro-Harmonix Holy Grail Max

David Burns

Electro Harmonix - Holy Grail Max - Reverb Demo

Peter Mallen

Holy Grail Max Pedal (Electro Harmonix)

Peter Mallen

Electro-Harmonix Holy Grail Max Reverb Pedal Steel Guitar Gear Review

johnnyupok

Reviews

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PROS

Reverse reverb mode offers unique soundscapes
Plate reverb setting provides natural, musical tones
Allows precise control over reverb time and blend
Maintains high-end frequencies, enhancing overall sound quality
Durable, solid enclosure ensures longevity
Capable of 100% wet mix for immersive effects
Versatile, offering spring, hall, and plate reverbs
Suitable for creating ambient sounds with long decay times
Enhances shoegaze and ambient music genres effectively

CONS

Casing aesthetics considered unattractive by some
Lacks a predelay knob for advanced reverse reverb control
Missing a tone knob for adjusting reverb brightness
Some users report popping sounds when switching on/off
Volume decrease noticed by a few users
One instance of early product failure reported

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Electro-Harmonix Holy Grail Max.

Features and functionality

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The Holy Grail Max offers control over decay time, which the Nano lacks, allowing users to fine-tune their reverb effects.
Source
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The Holy Grail Max includes an effects loop, allowing users to place other pedals between the Soul Food and Holy Grail sections and switch the order of reverb and overdrive.
Source

Comparisons

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The Max includes a plate mode and a reverse mode, while the Nano features a Flerb mode, highlighting the distinct functionalities between the two.
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Oceans 11 provides a 6G15-style spring mode, differing from the amp-style spring in the Holy Grail Max, impacting the reverb's tonal characteristics.
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Despite its versatility, some users find the Boss RV-6 offers more reverb algorithms and stereo output, providing broader tonal options than the Holy Grail Max.
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The EHX Cathedral is often mentioned as a larger, more feature-rich alternative, although it requires more pedalboard space, making it less ideal for compact setups.
Source

Use cases and applications

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The reverse reverb on the Max is particularly suited for genres like shoegaze and psych-blues, which benefit from atmospheric soundscapes.
Source
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The blend control can go full wet, which is particularly useful for creative reverse reverb applications, favored by users for shoegaze and atmospheric genres.
Source

User experience

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Several users report reliability issues with EHX pedals, noting problems like high-pitched oscillations after extended use, which affects the usability of the pedal.
Source

Value and pricing

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Owners suggest setting alerts on platforms like Reverb and eBay to find the Holy Grail Max for closer to $100, as it can frequently appear in good used condition at that price.
Source

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4.5 out of 5

Based on 5 Reviews and 26 Ratings

5 star

4 star

3 star

2 star

1 star

diamondhead27

287

about 1 year ago

Great simple reverb, but there are better options.

This is a very simple pedal that covers the basics well, all of the algorithms sound great and unlike a lot of simple reverbs, this can go fully wet. This reverb is not as hi-fi sounding and pristine as other reverbs like the RV-6, Polara or HoF2, but as aforementioned, I think they all sound fantastic.

This reverb is already showing its age however. For its price and size, this pedal gets outshined by more modern and versatile offerings like the RV-6, Oceans 11 and the Hall of Fame 2. The oceans 11 in particular, sounds nearly identical, it’s the same price, it’s smaller and it’s far more versatile.

All that being said, for a lot of people (including me) this pedal serves a particular niche, and that’s the fact that this does both reverse and can go fully wet. Place it before distortion and this pedal can do the mbv thing (and by extension most shoegaze) particularly well and there’s little out there, (short of the discontinued RV-7 and Polara) that sounds the same. The Oceans 11’s reverse doesn’t sound nowhere near as good to me, the swell and attack has an abrupt change of volume that the Holy grail doesn’t have.

In conclusion, unless you want an incredibly simple/no bullshit reverb and/or are a into shoegaze, I think there are better offerings out there.

Roles:

Guitarist

Genres:

Alternative rock Indie rock Progressive rock

From Gear Setup

alone3579

over 5 years ago

Awesome

This is the perfect pedal for your shoegazey needs. I thought I’d only use the reverse reverb, but once I heard the other three reverb types I fell in love.

jpgauthier

462

about 6 years ago

Love it

I was looking for a Holy Grail with a TIME adjustement. This it it ! Really love the Plate setting too.

Roles:

Singer Guitarist

Genres:

Rock Folk, World, & Country Indie folk

tamed_confused

138

over 9 years ago

Great pedal

Really huge scale of sounds but the reverse could be a bit better since the sustain is not too long. Otherwise it is perfect reverb, especially comparing to the basic Holy Grail.