1. Introduction
Thank you for purchasing the LyxPro 20-Watt Electric Guitar Amplifier. This manual provides essential information for the safe and effective operation, setup, and maintenance of your new amplifier. Please read this manual thoroughly before using the product and retain it for future reference.
2. Important Safety Information
- Power Source: Ensure the amplifier is connected to a power supply that matches the voltage specified on the unit.
- Ventilation: Do not block any ventilation openings. Ensure adequate airflow around the amplifier to prevent overheating.
- Water and Moisture: Do not expose the amplifier to rain, moisture, or any liquids. Do not place objects filled with liquids, such as vases, on the amplifier.
- Heat Sources: Keep the amplifier away from heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Cables: Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Cleaning: Unplug the amplifier from the wall outlet before cleaning. Use a dry cloth for cleaning.
3. Package Contents
Upon opening the package, please verify that all items listed below are present and in good condition:
- LyxPro 20-Watt Electric Guitar Amplifier (Model AGL20)
- Power Cable
- Instruction Manual (this document)
4. Product Overview
The LyxPro 20-Watt Electric Guitar Amplifier is a compact and versatile amplifier designed for practice and small jamming sessions. It features essential controls for shaping your sound and convenient input/output options.

Figure 4.1: Front panel of the LyxPro 20-Watt Electric Guitar Amplifier with labeled controls including Input, Aux Drive, Gain, Bass, Treble, Volume, Phone, and Power switch.
Front Panel Controls:
- INPUT: 6.35mm (1/4-inch) jack for connecting your electric guitar or other instrument.
- AUX DRIVE: Button to engage the overdrive/distortion effect.
- GAIN: Controls the amount of input signal, affecting the level of distortion when Drive is engaged.
- BASS: Adjusts the low-frequency response of the amplifier.
- TREBLE: Adjusts the high-frequency response of the amplifier.
- VOLUME: Controls the overall output volume of the amplifier.
- PHONE: 6.35mm (1/4-inch) headphone output jack for silent practice. Connecting headphones will mute the main speaker.
- POWER: On/Off switch for the amplifier.

Figure 4.2: The LyxPro 20-Watt Electric Guitar Amplifier, showcasing its compact design and front panel layout.
5. Setup
- Placement: Place the amplifier on a stable, flat surface. Ensure there is sufficient space around the unit for proper ventilation. Avoid placing it near direct heat sources or in enclosed spaces.
- Power Connection: Ensure the amplifier's POWER switch is in the 'OFF' position. Connect the provided power cable to the amplifier's power input and then to a suitable electrical outlet.
- Instrument Connection: Using a standard 6.35mm (1/4-inch) instrument cable, connect your electric guitar or other instrument to the INPUT jack on the front panel.
- Auxiliary Device Connection (Optional): If you wish to play along with music, connect an audio source (e.g., smartphone, MP3 player) to the AUX INPUT jack using an appropriate cable (not included).
- Headphone Connection (Optional): For silent practice, connect your headphones to the PHONE jack. This will automatically mute the amplifier's internal speaker.

Figure 5.1: The amplifier positioned in a typical practice environment, ready for use with an electric guitar.
6. Operating Instructions
- Powering On: Once all connections are made, set the VOLUME knob to its minimum (counter-clockwise) position. Then, flip the POWER switch to the 'ON' position. The power indicator light will illuminate.
- Adjusting Volume: Slowly turn the VOLUME knob clockwise to increase the overall output volume to your desired level.
- Tone Shaping (Bass & Treble):
- Turn the BASS knob clockwise to increase low frequencies for a fuller sound. Turn it counter-clockwise to reduce bass.
- Turn the TREBLE knob clockwise to increase high frequencies for a brighter sound. Turn it counter-clockwise to reduce treble.
- Using Overdrive (Grind):
- Press the AUX DRIVE button to engage the amplifier's built-in overdrive effect. The indicator light next to the button will illuminate.
- Adjust the amount of distortion using the GAIN knob. Turning it clockwise will increase the distortion level.
- To disengage the overdrive, press the AUX DRIVE button again.
- Using Aux Input: The Aux input allows you to connect an external audio device and play along with your favorite tracks. The volume of the Aux input is controlled by the external device itself.
- Using Headphone Output: When headphones are plugged into the PHONE jack, the main speaker will be muted, allowing for private practice. The headphone volume is controlled by the amplifier's VOLUME knob.
- Powering Off: Before turning off the amplifier, set the VOLUME knob to its minimum position. Then, flip the POWER switch to the 'OFF' position. Disconnect all cables when not in use.

Figure 6.1: A user engaging with the amplifier, demonstrating its use in a personal practice scenario.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use abrasive cleaners, waxes, or solvents as they may damage the finish.
- Storage: When not in use for extended periods, store the amplifier in a cool, dry place, away from direct sunlight and extreme temperatures.
- Handling: Always handle the amplifier with care. Avoid dropping it or subjecting it to strong impacts. The rubber corner edges provide protection, but excessive force can still cause damage.
- Cable Care: Regularly inspect all cables for signs of wear or damage. Replace any frayed or damaged cables immediately to ensure safe operation.
8. Troubleshooting
If you encounter any issues with your LyxPro amplifier, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speaker/headphones |
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| Distorted or unclear sound |
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| Humming or buzzing noise |
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If the problem persists after trying these solutions, please contact LyxPro customer support for further assistance.
9. Specifications
Below are the technical specifications for the LyxPro 20-Watt Electric Guitar Amplifier (Model AGL20):

Figure 9.1: Dimensions of the LyxPro 20-Watt Electric Guitar Amplifier.
| Model Number: | AGL20 |
| Output Wattage: | 20 Watts |
| Item Weight: | 6.05 pounds (2.74 kg) |
| Product Dimensions (L x W x H): | 11.2 x 4.1 x 11.6 inches (28.4 x 10.4 x 29.5 cm) |
| Connector Type: | 6.35mm (1/4-inch) Jack |
| Compatible Devices: | Electric Guitar, Banjo, Cello, Drum, Keyboard |
| Material Type: | Wood |
| Color: | Black |
| Power Source: | Electric |
10. Warranty and Support
For information regarding warranty coverage and customer support for your LyxPro 20-Watt Electric Guitar Amplifier, please refer to the official LyxPro website or contact their customer service directly. Details are typically provided with your purchase documentation or can be found on the manufacturer's official support pages.
LyxPro Official Website: Visit the LyxPro Store on Amazon