Electro-Harmonix Holy Grail Nano Reverb Pedal Leave a Comment / Uncategorized / By Alexander / October 17, 2016 87 GEARANK 87 out of 100. Incorporating 750+ ratings and reviews. Street Price: $137.90 Manufacturer: Electro-Harmonix Features: Digital Reverb Reverb Type: Spring, Hall, Flerb Input: 1/4″ Output: 1/4″ Power: Power Supply or 9V battery Compact “nano” size Weight: 0.55 lbs Related Items: The Best Reverb Pedals for Guitar The Best Cheap Guitar Amps Under $200 The Best Cheap Electric Guitars Under $200