John began using the Electro-Harmonix Holy Grail Reverb around the time of the By the Way release, circa 2002. It was a regular feature on his pedalboard during the album tour, which suggests the same unit was likely used in the studio sessions. This pedal also played a prominent role throughout the Stadium Arcadium era.
It’s worth noting that the Holy Grail hasn’t been spotted on John’s pedalboard during the Unlimited Love era. (See: John Frusciante’s 2022 Pedalboard).
Holy Grail and the Clean Sound
Most of the time, John had the Holy Grail set up between his Boss CE-1 Chorus and his Marshall Major amp. To clarify, the CE-1 was primarily used to split his signal between two amps: a Marshall Major for his clean sound and a Marshall Silver Jubilee for his crunch tone. (Thanks to Beardog for pointing out the earlier mix-up regarding this setup!)
This configuration highlights the critical role the Holy Grail played in shaping John’s clean sound—at least when used in this specific way.
In the Studio
In a 2006 interview with Guitar Player magazine, John revealed that the Holy Grail was featured on several tracks from Stadium Arcadium. For example, it can be heard on “Hey” and “Animal Bar” (set to spring mode), and on “Strip My Mind,” where it was paired with a Big Muff fuzz for the solo.
As for the By the Way album, there doesn’t appear to be an interview where John detailed his effect usage. If you come across one, feel free to share it in the comments below!
Vintage vs. Modern Holy Grail Models
John used a vintage Holy Grail Reverb model, which is now only available second-hand. The closest alternative is the EHX Holy Grail Nano, which offers similar functionality on paper—though many fans believe the original sounds far better.
I love the Frusciante clean sound whichever of the Marshals was used for it, it’s great to see that pedal board set up with the Electro Harmonix in it.
The pictured original Holy Grail reverb belonged to a close friend and very fine guitarist who died about 20 years ago, and I kinda inherited it, as I was using it at the time of his death. Until recently I had no idea that it was so sought after. I wouldn’t sell it at any price, obviously, but this weekend I lent it to my son, who has also just been lent a vintage Emmons pedal steel (by another close friend who is fortunately very much alive!) I wouldn’t have let the pedal out of my sight even then, however my son’s Fender ‘Vaporiser’ amp has developed a fault with the reverb tank and feeds back like a wounded animal. The Emmons sounds fantastic with the Holy Grail. It’s got a lovely, melancholy far away feel.
Would like to the mention his amp use. The Marshall major will be the clean sound. It’s a 200 watt amp, no way that’s the crunch. So the silver jubilee would be the crunchy amp, and the major being a full body clean sound. Practically endless headroom in those old rare 200 watt Marshall amps. Great source of info though!