1. Utangulizi
The JOYO Gem Box II is a versatile guitar multi-effects processor designed to provide a wide range of tones and functionalities for guitarists. This unit features a high-brightness LCD display, multiple effect modules, amp simulations, drum rhythms, and a built-in expression pedal. This manual will guide you through the setup, operation, and maintenance of your Gem Box II.
2. Vipengele
- High brightness LCD display for clear visibility.
- 8 Effect modules and 66 Effect types for diverse sound shaping.
- 23 Drive sounds with 7 legendary amplifier simulators.
- 80 Factory preset patches and 80 User patches for storing custom sounds.
- 40 Drum rhythms and 10 Metronome rhythms for practice and jamming.
- Built-in Expression Pedal for real-time control of volume or effect parameters.
- Utendakazi wa kitafuta njia jumuishi.
3. Yaliyomo kwenye Kifurushi
Tafadhali hakikisha kuwa bidhaa zote zipo kwenye kifurushi chako:
- JOYO Gem Box II Multi-Effects Pedal
- Power Adapter (not explicitly listed but implied for operation)
- 2 Instrument Cables
- Kusafisha Nguo
- Mwongozo wa Mtumiaji (hati hii)
4. Vidhibiti na Kazi
Familiarize yourself with the various controls and their functions on the Gem Box II.

Rudia view of the JOYO Gem Box II multi-effects pedal, featuring its control knobs, LCD screen, footswitches, and expression pedal. Also shown are two black instrument cables with silver connectors and a gray cleaning cloth.
4.1. Vidhibiti vya Paneli za Juu
- VALUE Knob: Adjusts parameter values, navigates menus, and selects options.
- Knobo ya MODE: Selects different operating modes or effect modules.
- PEDAL Button: Assigns the expression pedal to control specific parameters.
- Kitufe cha HIFADHI: Saves edited patches or settings.
- TAP Kitufe: Sets the tempo for delay effects or drum machine.
- Kitufe cha LOOP: Activates and controls the looper function.
- RHYTHM Button: Accesses and controls the drum machine and metronome.
- Onyesho la LCD: Shows current patch number, effect parameters, tuner display, and menu information.
- ON/OFF Indicator: LED light indicating the unit's power status.
4.2. Miguu ya miguu
- PLAY/RECORD Footswitch: Initiates playback or recording in looper mode. Also used for navigating patches.
- STOP/DELETE Footswitch: Stops playback or deletes recordings in looper mode. Also used for navigating patches.
- HOLD FOR TUNING: Press and hold both footswitches simultaneously to activate the built-in tuner.
4.3. Pedali ya Kujieleza
The integrated expression pedal can be used to control various parameters in real-time, such as volume, wah, or other effect parameters, depending on its assignment.
5. Kuweka
5.1. Uunganisho wa Nguvu
- Ensure the Gem Box II is switched off.
- Connect the provided power adapter to the DC IN jack on the pedal.
- Chomeka adapta ya nishati kwenye kifaa cha AC kinachofaa.
5.2. Uunganisho wa Sauti
- Unganisha gitaa yako kwa PEMBEJEO jack using a standard instrument cable.
- Unganisha PATO jack of the Gem Box II to your amplifier, mixer, or audio interface using another instrument cable.
6. Maagizo ya Uendeshaji
6.1. Kuwasha/Kuzima
To power on the unit, ensure the power adapter is connected, then press the power button (if available, or it powers on automatically upon connection). To power off, disconnect the power adapter.
6.2. Navigating Presets
Use the PLAY/RECORD and STOP/DELETE footswitches to scroll through the available factory and user presets. The LCD display will show the current patch number and name.
6.3. Editing Effects
- Select a patch you wish to edit.
- Use the MODE knob to select the effect module you want to adjust (e.g., Drive, Modulation, Delay).
- Use the VALUE knob to adjust the parameters within the selected effect module.
- Repeat for other effect modules as desired.
6.4. Kuhifadhi Presets
- After editing a patch, press the SAVE button.
- Use the footswitches or VALUE knob to select a user patch location to save your edited sound.
- Bonyeza kitufe cha HIFADHI tena ili kuthibitisha.
6.5. Using the Tuner
Press and hold both footswitches simultaneously to activate the tuner. Play a single note on your guitar, and the LCD display will show the note and indicate if it is sharp, flat, or in tune. Press either footswitch to exit tuner mode.
6.6. Using the Drum Machine and Metronome
- Press the RHYTHM button to enter drum/metronome mode.
- Use the VALUE knob to select different drum patterns or metronome types.
- Use the TAP button to set the tempo.
- Press the RHYTHM button again to exit.
6.7. Using the Looper
- Press the LOOP button to enter looper mode.
- Press the PLAY/RECORD footswitch once to start recording.
- Press the PLAY/RECORD footswitch again to stop recording and start playback.
- Press the PLAY/RECORD footswitch a third time to overdub.
- Press the STOP/DELETE footswitch once to stop playback.
- Press and hold the STOP/DELETE footswitch to delete the recorded loop.
- Press the LOOP button again to exit looper mode.
6.8. Expression Pedal Functions
Press the PEDAL button to assign the expression pedal. You can typically assign it to control volume, wah, or other effect parameters. Refer to the on-screen prompts or specific menu options for detailed assignment procedures.
7. Matengenezo
To ensure the longevity and optimal performance of your JOYO Gem Box II, follow these maintenance guidelines:
- Kusafisha: Use a soft, dry cloth (like the one provided) to wipe down the unit. For stubborn dirt, a slightly damp cloth can be used, but ensure no moisture enters the unit. Avoid abrasive cleaners or solvents.
- Hifadhi: Store the pedal in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. If transporting, use a padded case to protect it from physical damage.
- Nguvu: Always use the specified power adapter. Disconnect power when the unit is not in use for extended periods.
8. Utatuzi wa shida
If you encounter issues with your Gem Box II, consult the table below for common problems and solutions.
| Tatizo | Sababu inayowezekana | Suluhisho |
|---|---|---|
| Hakuna nguvu | Adapta ya umeme haijaunganishwa au hitilafu. | Ensure power adapter is securely connected and plugged into a working outlet. Test with another compatible adapter if available. |
| Hakuna pato la sauti | Incorrect cable connections; volume too low; effect bypassed. | Check all input/output cables. Increase amplifier volume. Ensure the pedal is not in bypass mode or that the patch volume is not set to zero. |
| Sauti iliyopotoka au yenye kelele | Input level too high; faulty cables; power supply issues. | Adjust guitar output or pedal input level. Try different cables. Ensure power supply is stable and correct voltage. |
| Expression pedal not working | Not assigned to a parameter; calibration issue. | Press the PEDAL button to assign it. Check the manual for calibration steps if available. |
If the problem persists after trying these solutions, please contact JOYO customer support.
9. Vipimo
| Kipengele | Vipimo |
|---|---|
| Uzito wa Kipengee | Pauni 2 (kilo 0.91) |
| Vipimo vya Bidhaa | Inchi 10 x 6 x 4 (sentimita 25.4 x 15.24 x 10.16) |
| Nambari ya Mfano wa Kipengee | joyo gem box 2 |
| Rangi | Nyeusi |
| Umbizo la Mawimbi | Analogi |
| Chanzo cha Nguvu | Umeme wa Cord |
| Voltage | 9 Volts |
| Moduli za Athari | 8 |
| Aina za Athari | 66 |
| Amp Waigaji | 7 |
| Viraka vilivyowekwa mapema | 80 Factory, 80 User |
| Midundo ya Ngoma | 40 |
| Metronome Rhythms | 10 |
10. Udhamini na Msaada
The JOYO Gem Box II comes with a standard manufacturer's warranty. Please refer to the warranty card included with your product for specific terms and conditions. For technical support, service, or warranty claims, please contact JOYO customer service through their official website or your authorized dealer.





