Electro-Harmonix Holy Grail Reverb MAXThe Holy Grail Max shares the Holy Grails remarkable Spring and Hall reverbs. Then we added a Plate reverb, with its wonderfully lush tone, and Reverse reverb for the sonically adventurous. The Maxs multi function control lets you adjust decay or reverse time. With the Holy Grail Max your quest for the perfect, portable reverb pedal is answered. Specificiations Spring, Hall, Plate and Reverse reverb 9. 6DC 200 power supply included True bypass for