Electro-Harmonix Holy Grail Max Reverb Pedal


89 out of 100. Incorporating 100+ ratings and reviews.

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Electro-Harmonix Holy Grail Max Reverb Pedal
Electro-Harmonix Holy Grail Max Reverb Pedal

The Holy Grail Max is part of Electro-Harmonix popular line of reverb pedals, with this one carrying a few more features for sonic versatility while still keeping the interface and control options within old school territory.

For a pedal with a wide palette of reverb sounds, this pedal features a simplistic set of controls that allow for reverb type switching, and adjustments for the time and blend parameters.

Red Hot Chilli Peppers' Josh Klinghoffer has been seen using this pedal to lay down the complex and funky guitar lines that his band requires.


  • Digital Reverb
  • Reverb Types: Hall, Spring, Plate, Reverse
  • Controls: Time, Blend, Reverb Type
  • Input: 1/4"
  • Output: 1/4"
  • Power: 9.6 DC Power Supply
  • Bypass Type: True Bypass
  • Dimensions: 3.2" x 6.2" x 7.2"
  • Weight: 1.4 lbs


Sound quality and ease of use are the top two reasons provided by users who gave this pedal top ratings. To be specific, the quality of the spring reverb mode impressed a number of gear heads, who found that the reliability and consistency of the pedal makes it a viable alternative to their more expensive vintage spring reverb units. The pedal's easy operation and the quality of the reverse mode also got a lot of thumbs up. Many recommend the Holy Grail Max as a great set and forget pedal for those who just want to add subtle reverb to their tone.


There was one user who found the Hall, Plate and Spring reverbs to be of low quality, but his complaint is drowned by others who found the pedal to be of top quality. Other concerns include the pedal's bulky form factor and non-standard shape, which is the case for most EHX pedals.


If you are looking for an old school reverb pedal that will get the job done without much complication then the EHX Holy Grail Max is highly recommended. Otherwise, if you're interested in looking at other options then your'll find our recommended list in our guide to The Best Reverb Pedals.