JOYO GEM BOX III Multi-Effects Guitar Processor
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Overview
Build complete guitar tones for practice, recording and live use from one floor processor. The JOYO GEM BOX III combines amp modelling, effects, cabinet simulation, third-party IR loading, a looper and rhythm tools in a flexible signal chain.

Why You’ll Love It
- 55 high-quality preamp models and 151 effect types across nine effect modules.
- 26 built-in cabinet simulations plus support for compatible third-party impulse-response files.
- 300 preset slots and an adjustable signal chain for organising effects around your playing style.
- USB recording, computer editing and firmware updates bring practice and production into one workflow.
- Integrated 52-second looper, 40 drum patterns and 10 metronome rhythms for songwriting and rehearsal.
Where It Fits Best
- Home practice through headphones
- Direct USB recording and computer-based production
- Live performance with programmable outputs
- Tone building with third-party cabinet IRs
- Songwriting with the looper and onboard rhythm tools

Detailed Specifications
| Preamp models | 55 |
|---|---|
| Effect architecture | 9 modules / 151 effect types |
| Built-in cabinet models | 26 |
| Preset capacity | 300 tones |
| Looper | 52 seconds |
| Rhythm tools | 40 drum patterns and 10 metronome rhythms |
| USB functions | Recording, PC editing and firmware updates |
| Headphone output | Supported |
| Auxiliary audio input | Supported |
| IR file format | WAV |
| Internal sampling precision | 24-bit |
| Third-party IR precision | 16 / 24 / 32-bit supported |
| Sampling rate | 44.1 kHz; full-rate third-party IR loading supported |
| IR sample length | 1024 points |
| Windows note | ASIO4ALL driver required for Windows USB recording |
How to Get Started
- Connect the guitar to the processor input and connect the selected output to an amplifier, mixer, audio interface or headphones.
- Select a preset or build a tone using the preamp, effect and cabinet modules.
- Arrange the internal signal chain and adjust parameters with the physical controls.
- For USB recording or editing, connect to a compatible computer and install the required software or Windows driver.
- Set output volume low before powering connected audio equipment, then raise it gradually.
What’s in the Box
- JOYO GEM BOX III multi-effects processor
FAQ
Can I load third-party cabinet IR files?
Yes. Compatible WAV-format IR files are supported. The unit supports 16-, 24- and 32-bit third-party files.
Can I practise silently?
Yes. Connect compatible headphones to the headphone output and use the auxiliary input if you want to play along with external audio.
Can it record directly to a computer?
USB recording is supported. Windows users require the ASIO4ALL driver; software and computer compatibility should be confirmed before purchase.
Does it include rhythm tools?
Yes. It includes a 52-second looper, 40 drum patterns and 10 metronome rhythms.
Only the items explicitly listed in “What’s in the Box” are included. Other products or equipment shown in demonstration images are not included.