Electro-Harmonix Holy Grail Plus Instruction Manual

WARNING:

Use only the 9.6VDC/200mA AC adapter the Holy Grail + comes supplied with.
Do not use any other AC adapters. Using other AC adapters, even those made by Electro­Harmonix, could cause harm to the unit, the adapter or you. The Holy Grail + does not use
batteries.

Holy Grail Plus

Reverb Pedal

Congratulations on your purchase of the Holy Grail Plus. The Holy Grail Plus starts with the
sounds found in the Holy Grail and Holier Grail: Spring, Hall, Room and Flerb. An AMOUNT
knob has been added to give the musician further control over the reverbs.

- EFFECT DESCRIPTIONS -

SPRING REVERB

The Spring Reverb effect is a simulation of the spring reverb found in many classic guitar
amps. In SPRING mode, the AMOUNT knob controls the size of the spring reverb. The
further you turn the AMOUNT knob clockwise, the bigger the spring reverb will be. Set the
AMOUNT knob to 3 o’clock to obtain the Spring Reverb found in the Holy Grail.

HALL REVERB

Hall Reverb is a simulation of the reverb heard in a large space In HALL mode, the AMOUNT
knob controls the reverb time. The further you turn the AMOUNT knob clockwise, the longer
the reverb time and the larger the reverb space. Using the AMOUNT control you can obtain
reverb spaces from a room to a large hall. To obtain the Hall Rev erb sound found in the Holy
Grail, turn the AMOUNT knob to 4 o’clock.

ROOM REVERB

Room Reverb is a simulation of the reverb heard in a small space. In ROOM mode, the
AMOUNT knob controls the damping factor of the reverb. As the AMOUNT knob is turned
clockwise, the reverb will be less damped. Set the AMOUNT knob to its minimum position
(full counter-clockwise) and the reverb will be heavily damped, sounding like a bathtub
reverb. Turn the AMOUNT knob to full clockwise and the reverb sounds like an open room
with no damping.

FLERB REVERB

The Flerb Reverb effect is made up of a reverb followed in series by a flanger. In FLERB

mode, the AMOUNT knob controls the rate of the Flerb’s modulation. As you turn AMOUNT

clockwise, the rate of modulation increases. To obtain the Flerb sound found in the Holy Grail,

turn the AMOUNT knob to 8 o’clock.

- CONTROLS -

REVERB Switch

HALL, ROOM and FLERB.

AMOUNT Knob

REVERB Mode AMOUNT Parameter

Spring Spring Time/Reverb Time
Hall Reverb Time
Room Damping Amount
Flerb Modulation Rate/Flanger Feedback

BLEND Knob

100% Wet (clockwise position). Set the BLEND to about 1 o’clock for a nice mix of both.

STATUS LED and BYPASS FOOTSWITCH

effect is active, when the
Bypass Footswitch to toggle between the two modes.

INPUT Jack

presented at this jack is 680k.

OUTPUT Jack

impedance at this jack is 360.

9V Power Jack

this jack located at the top of the Holy Grail Plus. The Holy Grail Plus requires 9VDC at
200mA with a center negative plug. The Holy Grail Plus accepts Boss style AC Adapters.

– Chooses the reverb mode. From left to right, the modes are SPRING,

– The function of the AMOUNT knob changes with each REVERB mode:

– Controls the wet/dry mix from 100% Dry (counter-clockwise position) to

– When the

LED

is off, the Holy Grail Plus is in True Bypass mode. Use the

– This ¼” jack is the audio input to the Holy Grail Plus. The input impedance

– This ¼” jack is the audio output from the Holy Grail Plus. The output

– Plug the output of the AC Adapter supplied with the Holy Grail Plus into

LED

is lit, the Holy Grail Plus