1. Introduction
The Zoom G2 Four is a versatile guitar multi-effects processor designed to provide guitarists with a wide array of tones and creative tools. Featuring advanced amp modeling with Multi-Layer IR technology, a comprehensive suite of built-in effects, a looper, and a rhythm section, this lightweight unit is suitable for practice, performance, and recording.
2. Key Features
- 79 built-in guitar effects and 22 Amp Models.
- Amp Models utilize new Multi-Layer IR Technology for realistic cabinet response.
- 250 factory presets and 300 total patch memories.
- 80-second looper for creating layered performances.
- Built-in rhythm machine with 68 diverse beats.
- Integrated tuner for accurate tuning.
- Audio interface functionality for direct recording to a Digital Audio Workstation (DAW).
- Cross-key navigation for hands-free control.
- Compatible with Zoom Guitar Lab app for iOS and Android for expanded effects and patch management.
3. Setup
Before using your Zoom G2 Four, ensure it is properly connected and configured for your audio setup.
3.1 Powering On
The unit can be powered via USB or a 9V power adapter (supplied). Connect the power source to the 'POWER' input on the rear panel. Once powered on, the unit will prompt you to select your output type.

Figure 3.1: Rear panel of the Zoom G2 Four, highlighting the power input and various audio connections.
3.2 Output Selection
Upon initial power-up, the G2 Four will display an output selection screen. Choose between 'AMP' (for connecting to a guitar amplifier) or 'LINE' (for connecting to studio monitors, PA systems, or headphones). This optimizes the tone for your specific playback environment.
Video 3.2: An introductory video demonstrating the features and setup of the Zoom G2 Four and G2X Four multi-effects processors.
4. Operating Instructions
4.1 Amp Modeling and IR Technology
The G2 Four features advanced amp models that faithfully reproduce classic amplifiers. These models are paired with their original cabinet impulse responses (IRs) which utilize innovative Multi-Layer IR technology. This technology captures IRs at three different volumes, blending and activating them based on your guitar's input volume, providing a dynamic and realistic playing feel.

Figure 4.1: The Zoom G2 Four's display showing the effects chain and parameters for amp modeling.
4.2 Effects and Presets
The unit comes pre-loaded with 250 preset patches, each designed to recreate the sound of iconic songs from various eras. You can also build your own custom patches from a selection of over 100 effects, including classic spring reverbs, extreme distortions, modulation effects, wah, and more. Each patch is a chain of up to seven effects.

Figure 4.2: Overview of the Zoom G2 Four's controls, including footswitches and rotary encoders for effect adjustments.
4.3 Looper and Rhythm Section
An 80-second built-in looper allows for creative layering of guitar parts. The rhythm machine offers 68 different beats, covering genres from metal to blues, providing a versatile tool for practice and songwriting.
4.4 Hands-Free Navigation
The cross-key navigation system enables you to control the pedal using only your feet, allowing for seamless adjustments during live performance or practice without interrupting your playing. The four rotary encoders provide quick access for fine-tuning effect parameters.

Figure 4.3: Hands-free control of the G2 Four using the footswitches for navigation and adjustments.
5. Connectivity and Recording
5.1 Direct Recording to DAW
The G2 Four can function as an audio interface, allowing you to record directly to your computer's Digital Audio Workstation (DAW). Simply connect the pedal to your computer via a USB cable. This enables you to capture your guitar tracks with all the effects and amp models processed by the unit.

Figure 5.1: The Zoom G2 Four connected to a laptop for direct recording into a DAW.
5.2 Zoom Guitar Lab App
Expand your library of patches and effects by connecting your G2 Four to the free Zoom Guitar Lab app, available for iOS and Android devices. This app also allows you to back up your current patches and manage your tones efficiently.

Figure 5.2: The Zoom G2 Four connected to a mobile device running the Guitar Lab app for effect management.
6. Maintenance
To ensure the longevity and optimal performance of your Zoom G2 Four, follow these general maintenance guidelines:
- Keep the unit clean by wiping it with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
- Protect the unit from extreme temperatures, humidity, and direct sunlight.
- Avoid dropping the unit or subjecting it to strong impacts.
- Disconnect power when not in use for extended periods.
7. Troubleshooting
If you encounter issues with your Zoom G2 Four, consider the following basic troubleshooting steps:
- No Power: Ensure the power adapter is securely connected and the power outlet is functional. If using USB power, confirm the USB cable is connected to a powered port.
- No Sound: Check all audio cables and connections. Verify the correct output type (AMP/LINE) is selected. Ensure your guitar's volume is up and the unit's master volume is adjusted.
- Unexpected Sound/Noise: Check for loose cables. Ensure proper grounding. Review your patch settings for any effects that might be causing unwanted noise.
- App Connectivity Issues: Ensure the unit is in USB mode for app connection. Check your device's USB settings and try restarting both the unit and your mobile device.
For more complex issues, refer to the official Zoom support resources or contact customer service.
8. Specifications
| Feature | Specification |
|---|---|
| Item Weight | 2.17 pounds |
| Product Dimensions | 9.7 x 6.3 x 3 inches |
| Hardware Interface | 1/4-inch Audio |
| Signal Format | Analog |
| Power Source | USB-Powered |
| Voltage | 9 Volts |
| Color | Black |
| Style | Looper, Multi-effects |
9. Warranty and Support
For information regarding warranty coverage, technical support, or service, please visit the official Zoom website or contact their customer support directly. Keep your proof of purchase for warranty claims.





