Introduction
Thank you for choosing the XMSJ GAX-HM80 Professional DJ Flight Mixer. This 8-channel audio mixer features an integrated high-power amplifier, designed for robust performance in various public occasions, including outdoor stages. Its durable hard case ensures portability and protection. This manual provides essential information for the proper setup, operation, and maintenance of your mixer.
Key Features
- 8-Channel Professional Mixer
- Integrated High-Power Amplifier (650W * 2)
- Durable Engineering Flight Case for Protection and Portability
- Professional Balance Adjustment
- 16 Reverb Presets for Enhanced Audio Effects
- Wireless Bluetooth Playback Capability
- Built-in USB Playback for MP3 files
- 7-Band Stereo Graphic Equalizer for precise audio control
- Damping Faders for smooth and accurate adjustments
Package Contents
Please check the package for the following items:
- GAX-HM80 Professional DJ Flight Mixer
- Power Cable
- User Manual (this document)
- Any additional accessories (e.g., cables, adapters) as specified by the manufacturer.
Setup Instructions
- Unpack the Mixer: Carefully open the flight case and remove the mixer.
- Power Connection: Connect the provided power cable to the 'Power interface' on the rear panel of the mixer. Ensure the power switch is in the 'OFF' position before plugging into a suitable power outlet (220-240V).

Rear panel connections: Power switch, power interface, and speaker outputs.
- Speaker Connection: Connect your passive speakers to the 'Left channel power output' and 'Right channel power output' ports on the rear panel using appropriate speaker cables. The mixer features integrated amplification, so external power amplifiers are not required for passive speakers.
Video demonstrating power and speaker cable connections.
- Input Source Connection: Connect your microphones, instruments, or other audio sources to the 'LINE IN / MIC' input ports on the mixer's top panel. The mixer supports both XLR and 1/4" jack inputs.

Input ports for microphones and line-level devices.
- Power On: Once all connections are secure, switch the 'Power' button on the rear panel to the 'ON' position.
Operation Guide
Basic Audio Mixing
- Input Level Adjustment: Use the 'GAIN' knobs at the top of each channel strip to set the input level for your connected devices. Adjust until the 'PEAK' LED flashes only occasionally.
- Channel Volume: Use the individual channel faders to control the volume of each input source.
- Main Output: Adjust the 'MAIN L/R' faders to control the overall output volume to your speakers.
- Equalization (EQ): Each channel features 'HIGH', 'MID', and 'LOW' EQ knobs to shape the tone of your audio. The 7-band stereo graphic equalizer provides further fine-tuning for the overall mix.

High and low tone adjustment controls.
Reverb Effects
The mixer includes 16 built-in reverb presets. Use the 'PROGRAM' knob and digital display to select your desired effect. Adjust the 'FX' and 'PARAMETER' knobs to fine-tune the effect's intensity and characteristics.
Reverb preset selection and adjustment.
Wireless Bluetooth Playback
- Activate Bluetooth on your mobile device.
- Select the mixer's Bluetooth name (usually 'BT' or similar) from your device's available Bluetooth devices.
- Once paired, you can play audio wirelessly from your device through the mixer.

Wireless Bluetooth playback in action.
USB Playback
Insert a USB drive containing MP3 audio files into the 'USB' port on the mixer. The mixer will automatically detect and allow playback of the files. Use the dedicated controls near the USB port to navigate tracks and adjust playback.
USB drive inserted for MP3 playback.
Maintenance
- Cleaning: Regularly wipe the mixer's surface with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth and mild detergent, then dry thoroughly. Avoid abrasive cleaners or solvents.
- Storage: When not in use, store the mixer in its flight case to protect it from dust, moisture, and physical damage.
- Ventilation: Ensure the mixer's ventilation fan (located on the rear panel) is clear of obstructions to prevent overheating.
- Cable Care: Always handle cables by the connector, not the wire. Avoid sharp bends or kinks in cables.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Power not connected; main faders down; speaker cables loose; input gain too low. | Check power connection and switch; raise main faders; ensure speaker cables are secure; increase input gain. |
| Distorted sound | Input gain too high (clipping); main output too high; faulty cable. | Reduce input gain (monitor PEAK LED); lower main output; try different cables. |
| Bluetooth not connecting | Mixer not in pairing mode; device too far; interference. | Ensure mixer's Bluetooth is active; bring device closer; restart both devices. |
| USB playback not working | Unsupported file format; corrupted USB drive; USB drive not properly inserted. | Ensure files are MP3 format; try a different USB drive; re-insert USB drive. |
Specifications
| Attribute | Detail |
|---|---|
| Model Number | GAX-HM80 |
| Brand Name | XMSJ |
| Origin | Mainland China (Guangdong) |
| Product Name | Professional Mixer |
| Feature | Rigid mixer box with amplifier, integrated high-power audio device |
| Material | Durable plastic and metal construction |
| Power Output | 650W * 2 |
| Rated Power | 500W |
| Frequency Response | 20Hz-20KHz±3 |
| Color | Black |
| Dimensions (L x W x H) | 495 x 340 x 38 mm |
| Intended Use | Public Occasions |
User Tips
No specific user tips from reviews or Q&A were available for this product. Always ensure all connections are secure before powering on the device to prevent damage and ensure optimal performance.
Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your proof of purchase for any warranty claims.





