Holy Grail Neo

The Holy Grail Neo is an update of the original compact Holy Grail digital reverb. A three-way toggle switch selects between Spring, Hall and Plate algorithms. Spring recreates the reverb found in many guitar amplifiers, Hall simulates a large space such as a concert hall or cathedral, and Plate emulates the metal plate units used in professional studios in the 1960s and 70s.

Control is deliberately minimal: one Reverb knob sets the wet/dry balance from fully dry to fully wet. A footswitch toggles the effect on and off, and true bypass switching leaves the signal untouched when the pedal is disengaged. The algorithms were designed for electric guitar but are suitable for other instruments and vocals.

The pedal is mono, with a ¼" input jack and a ¼" amp output jack. It runs from a 9.6VDC, 200mA power adapter that is supplied, draws 75mA, and sits in a small, rugged chassis measuring 4.5 x 2.75 x 2.1 inches.