Holy Grail (old)
| Brand | Electro-Harmonix |
| Function | Effect (Reverb) |
| Country | USA |
| Form Factor | Footswitch |
| Signal Path | Digital Hardware (including Analog Connections) |
Added by pazifischer
| Brand | Electro-Harmonix |
| Function | Effect (Reverb) |
| Country | USA |
| Form Factor | Footswitch |
| Signal Path | Digital Hardware (including Analog Connections) |