Mooer GEM Box User manual

Guitar Multi-Effects Processor
Owner’s Manual

01
Contents
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Precautions
Items Explanation
Main Features
Battery Operation
Panel Instruction
Connections
Operation
Effects Explanation
Specification
Troubleshooting
Appendix
Patch Selecting
Drum Rhythm
Tuner
Expression Pedal
Patch Editing
Patch Storing/Copying
Patch Pre-Select Recall Function
Factory Reset
Patch List
Drum Rhythm List

02
Precautions
* PLEASE READ CAREFULLY BEFORE PROCEEDING *
Power Supply
Please connect the designated AC adapter to an AC outlet of the correct
voltage.
Please be sure to use only an AC adapter which supplies 9V DC, 300
mA, center minus.
Unplug the AC power adapter when not using or during electrical storms.
Connections
Always turn off the power of this and all other equipments before
connecting or disconnecting, this will help prevent malfunction and / or
damage to other devices. Also make sure to disconnect all connection
cables and the power cord before moving this unit.
Location
To avoid deformation, discoloration, or other serious damage, do not
expose this unit to the following conditions:
Direct sunlight
Heat sources
Magnetic fields
Extreme temperature or humidity
Excessive dusty or dirty location
High humidity or moisture
Strong vibration or shock
Interference with other electrical devices
Radios and televisions placed nearby may experience reception
interference. Operate this unit at a suitable distance from radios and
televisions.
Cleaning
Clean only with a soft, dry cloth. If necessary, slightly moisten the cloth.
Do not use abrasive cleanser, cleaning alcohol, paint thinners, wax,
solvents, cleaning fluids, or chemical-impregnated wiping cloths.
Handling
Do not apply excessive force to the switches or controls.
Do not let paper, metallic, or other objects into this unit.
Take care not to drop the unit, and do not subject it to shock or excessive
pressure.

03
Items Explanation
Patch
A patch is comprised of information about the on/off status and effect
parameter settings used in each module.
Bank
A bank is a group of ten patches. GEM Box has 8 banks, labelled with
numbers 0 to 3 (unchangeable preset banks) and letters A to d
(editable user banks).
Effect module
A patch can be thought of as a combination of up to 8 single effects.
Each such effect is referred to as an effect module.
Effect type
Some effect modules have several different effects which are referred
to as effect types. Only one of these can be selected at a time.
Effect parameter
All effect modules have various parameters that can be adjusted.
These are called effect parameters or simply parameters. When
thinking of an effect module as a compact effect, the parameters
change the tone and effect intensity similar to the knobs on the device.
Mode
Mode is the status of different function keys and controls, GEM Box
has Play Mode for selecting and playing patches, Rhythm Mode for
editing a drum rhythm, Edit Mode for modifying effects, and Store
Mode for saving patches.

04
Main Features
Battery Operation
8 Effect Modules
60 Effect Types
40 Preset Patches
40 User Patches
40 Drum Rhythms
Assignable Expression Pedal
Precise Tuning function
Patch Pre-Select Recall function
Compact operation interface
Lightweight and tiny for easy transportation
AC adapter 9V DC power supply
AA battery (x4) power supply
1. Turn off the GEM Box and open the battery holder on the bottom.
2. Insert 4 AA batteries and close the battery holder.
Press latch to release and then lift cover.
Latch
Four batteries (size AA)
Note: When the baeries are geing low, the display will show to indicate this
situation.
Note: When using baeries, it is suggested to disconnect the guitar cable plug from the
[INPUT] jack when not using the device, to conserve baery power.

05
EQ
NR/CAB
GAIN
DRIVE
COMP/WAH
PATCH LEVEL
RATE
DELAY
D.TIME
REVERB
DECAY
MODULATION
PLAY
STORE
RHYTHM
PEDAL
PLAY / STOP MODULE BYPASS
VALUE
EXP. PEDAL
BYPASS / TUNER
HOLD FOR MUTE TUNING
PATCH
Press
BANK PATCH
# EDIT
Panel Instruction
INPUT OUTPUT
DC9V
300mA
(PHONES)
1
4
8 91011
5
2 673
Guitar Multi-Effects Processor

06
Module Selector: Switches between every function module. In
patch edit mode, this knob selects the module/parameter for operation.
VALUE Knob with Enter Button: Dial the knob for setting master
level, or changing parameter values. Press the button to switch effect
type, ensure storing, etc.
LED Display: Shows bank and patch numbers, setting values, and
other information for operating.
PATCH – [PLAY/STOP] Footswitch: Selects patches
(backwards), controls the tuner, start/stop drum rhythm, and other
functions.
PATCH + [MODULE BYPASS] Footswitch: Selects patches
(forwards), controls the tuner, bypass effect module, and other
functions.
Expression Pedal: Adjusts volume or some effect parameters.
EXP. PEDAL LED: Indicates the status of the expression pedal.
INPUT Jack: 1/4” mono audio jack, for connecting guitar. When
operating GEM Box on batteries, plugging guitar cable into this jack will
turn on the unit.
OUTPUT [PHONES] Jack: 1/4” stereo audio jack, for connecting
headphone or guitar amplifier. Using a mono cable can output the
signal to an amplifier, or use a Y cable to output the signal to two
amplifiers. Also can plug a stereo headphone into this jack.
DC 9V Jack: For power supply, use a 9-volt DC regulated by AC
adapter, 300mA (plug polarity is positive on the barrel and negative in
the center).
Battery Holder: For installing batteries (AA x 4).
10
09
08
07
06
05
04
03
02
01
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Panel Instruction

07
INPUT OUTPUT
DC9V
300mA
(PHONES)
Connections
Guitar Headphones
Guitar amplifier Guitar amplifier
AC adapter

08
Operation
Patch Selecting
Power On
Plug the cable of AC Adapter
(9V, 300mA, center minus) into
the [DC 9V] Jack, when using
batteries, plug the guitar cable
into this jack will turn the device
on.
Selecting Patches
Set the Module Selector to [PLAY],
the LED display will show the
information of bank and patch
number, step on [PATCH +/-]
footswitch to change patches (Hold
one footswitch to switch patches
quickly).
Pressing [PATCH +] footswitch time and again (or holding [PATCH +]
footswitch) cycles through patches in the order ~ ... ~ , ~ ...
~ , . Pressing or holding [PATCH –] footswitch will switch
patches in the opposite order.
Adjusting the master volume
Set the Module Selector to [PLAY],
rotate [VALUE] knob to adjust the
master volume of GEM Box (when
setting up the master volume, LED
display will show the current level).
The range of master volume is ~ ,
70 is the default value.
01
03
02
BANK
Bank
name
Patch
name
PATCH
# EDIT
BANK PATCH
# EDIT
INPUT OUTPUT
DC9V
(PHONES)

09
Drum Rhythm
Selecting Drum Rhythm Type
Set the Module Selector to [RHYTHM],
LED display will show the rhythm type
firstly, and then rotate the [VALUE]
knob to select the rhythm type ( ~ ).
Adjusting Drum Rhythm Volume
Set the Module Selector to [RHYTHM],
LED display will show the rhythm type
firstly, and then press [VALUE] button
once, at that time, LED displays the
drum rhythm volume, then rotate the
[VALUE] knob to change the rhythm
volume ( ~ , the default value is ).
Changing Drum Rhythm Tempo
Set the Module Selector to
[RHYTHM], LED display will show the
rhythm type firstly, and then press
[VALUE] button twice, at that time, the
number displayed in LED indicates the
tempo of drum rhythm, then rotate the
[VALUE] knob to change tempo.
Start/Stop Drum Rhythm
When in RHYTHM mode or EDIT mode (Except PLAY/STORE
mode), press [PATCH –] footswitch will start the drum rhythm. When
the rhythm is playing, press [PATCH –] footswitch again to stop.
Note: You can’t stop the drum rhythm in PLAY/STORE mode.
01
03
04
02
BANK Drum Rhythm Type PATCH
# EDIT
BANK Drum Rhythm Volume PATCH
# EDIT
BANK Drum Rhythm Tempo PATCH
# EDIT
The range of the displaying tempo value is ~ , indicate the real
tempo 60~270 BPM, each rhythm has its own default tempo value.