---
product_id: 59467798
title: "Electro Harmonix XO Holy Grail Plus · Ground effect electric guitar"
brand: "electro-harmonix"
price: "$43.41"
currency: USD
in_stock: false
reviews_count: 5
url: https://www.desertcart.ec/products/59467798-electro-harmonix-xo-holy-grail-plus-ground-effect-electric-guitar
store_origin: EC
region: Ecuador
---

# Electro Harmonix XO Holy Grail Plus · Ground effect electric guitar

**Brand:** electro-harmonix
**Price:** $43.41
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Electro Harmonix XO Holy Grail Plus · Ground effect electric guitar by electro-harmonix
- **How much does it cost?** $43.41 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/59467798-electro-harmonix-xo-holy-grail-plus-ground-effect-electric-guitar)

## Best For

- electro-harmonix enthusiasts

## Why This Product

- Trusted electro-harmonix brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description



## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 18.42 x 8.13 x 15.75 cm; 589.67 Grams |
| Batteries | 1 9V batteries required. |
| Item model number | HOLY GRAIL+ |
| Colour | Silver |
| Signal Format | Analog |
| Number of Strings | 6 |
| Power Source | Electric |
| Voltage | 9 Volts |
| Item Weight | 590 g |

## Images

![Electro Harmonix XO Holy Grail Plus · Ground effect electric guitar - Image 1](https://m.media-amazon.com/images/I/51BvbLlSI7L.jpg)
![Electro Harmonix XO Holy Grail Plus · Ground effect electric guitar - Image 2](https://m.media-amazon.com/images/I/41W-27v5r+L.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    There's a reason Holy Grails are a staple of every ...
  

*by R***S on Reviewed in the United Kingdom on 14 July 2015*

There's a reason Holy Grails are a staple of every post rock pedal board. There's no reason to spend any more than this.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Brilliant
  

*by V***N on Reviewed in the United Kingdom on 12 July 2014*

As good as everyone says it is

### ⭐⭐⭐⭐ 4.0 out of 5 stars







  
  
    The best reverb I have ever owned to date
  

*by V***S on Reviewed in the United Kingdom on 30 March 2015*

The best reverb I have ever owned to date. The tone on it is so good, warm and true.BEWARE! BEWARE!THE REASON FOR THE FOUR STARS IS THAT THIS PEDAL ONLY WORKS ON EHX POWER-SUPPLY. NO OTHER POWER-SUPPLY WILL WORK. I USED TO DAISY CHAIN MINE USING DIAGO POWER-SUPPLY AND THE REVERB WOULD CUT OUT IF I PUT THE GAIN UP ON MY OVERDRIVE PEDAL AND STARTED TO PLAY REALLY HARD. THEN IT GOT TO THE POINT WHERE I COULDN'T EVEN TURN THE REVERB PEDAL ON WITHOUT PRESSING THE ON/OFF BUTTON ~5 TIMES THEN TURNING THE KNOBS RANDOMLY TO WAKE IT/ RESURRECT FROM ITS ETERNAL SLEEP. FROM WHAT I'VE HEARD AND SEEN ON FORUMS IT ALSO EVENTUALLY GIVES PROBLEMS ON VOODOO LABS, FUEL TANK... ETC.NOW PLEASE READ ON FOR THE REVIEWSpring and room sound exactly as one would expect them to sound. You can get all the surf and studio recording style ambiences from these two settings. Very good qualityBut I think the hall reverb on this pedal is one of the most underrated features of any EHX pedal. By using the blend and amount knobs wisely one can create, amazing norwegian fjord like soundscapes, or just lush sounding notes that really sing to the horizon. What I love about the hall reverb is its natural gradual decay time. It doesn't just die off all of a sudden, but it has this gradual fade away. Also it is a very smooth decay. By this I mean the hall setting produces proper reverberation, not echoes. i.e. you can't hear any individual repeats of the notes. This I found problematic with other pedals and their hall reverb settings, because they really sounded like a wet delay pedal; but not the holy grail plus. This is a smooth sounding hall reverb.It's hard for me to convey how much I love this setting. Let's put it this way I have been playing guitar for 10 years. I got this pedal 3 years ago. It totally changed my tone and view on the guitar as an instrument. To the point where my best sounding songs and tone are down to this pedal. I can't  play certain stuff I write without this pedal because to me it sounds a "too dry".  A good idea of what hall reverb sounds can come out of this pedal  can be heard on "Bloodshake" and "1998" by Peace or "Inhaler" by Foals. I'm not sure if they used this pedal on those tracks (they probably didn't) but this reverb pedal can produce sounds just like it, and even more lush.The flerb is wacky, a bit limited in my opinion but very trippy

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**Shop now:** [https://www.desertcart.ec/products/59467798-electro-harmonix-xo-holy-grail-plus-ground-effect-electric-guitar](https://www.desertcart.ec/products/59467798-electro-harmonix-xo-holy-grail-plus-ground-effect-electric-guitar)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-05*