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The Holy Grail Plus from Electro-Harmonix is a compact reverb pedal that features four different reverb algorithms: Spring, Hall, Room, and Flerb. The algorithms were designed and tailored for the electric guitar, but work equally well with most instruments and voices. This unit is equipped with controls for Amount and Blend. The function of the Amount knob varies depending on the Reverb mode setting. In both Spring and Hall modes, Amount controls the reverb time. In Room mode, Amount regulates the level of damping. In Flerb mode, it is used to adjust the modulation rate and flanger feedback. Blend controls the wet/dry mix in all modes. The unit is enclosed in a tough and compact die-cast chassis, and comes with a US9.6VDC-200BI power supply.
The Spring algorithm is a re-creation of the classic spring reverbs that are found in many guitar amplifiers. The Hall algorithm simulates the reverberations heard in large spaces such as concert halls and cathedrals. The Room algorithm is a simulation of the reverb heard in small spaces. The Flerb algorithm effect is made up of a reverb followed in series by a flanger. True bypass switching ensures your tone won't be affected when the pedal is bypassed.
Note: Use only the US9.6VDC-200BI power supply provided with the unit. Using other AC adapters, even those made by Electro-Harmonix, could cause harm to the unit or the adapter. The Holy Grail Plus requires 9 VDC @ 200 mA with a center negative plug and does not use batteries.
In the Box
Electro-Harmonix Holy Grail Plus Reverb Guitar Pedal
US9.6DC-200BI Power Supply
Limited 1-Year Warranty
Table of Contents
Controls and Indicators
Reverb switch Amount knob Blend knob Bypass footswitch with status LED
1/4" phone jack, input 1/4" phone jack, output DC Power jack, 9 VDC power input
Input: 680 kOhms Output: 360 ohms
9 VDC @ 200 mA
4.00 x 4.75 x 2.25" (102 x 121 x 89 mm)
Electro-Harmonix Holy Grail Plus Reverb Guitar Pedal Review