Introduction
Thank you for choosing the Depusheng FG12 12-Channel Audio Mixer Controller. This professional-grade mixer is designed for a wide range of audio applications, from live stage performances and DJ sets to studio recording and home entertainment. Featuring 12 mono inputs, 24 DSP effects with 99 programs, USB compatibility, Bluetooth connectivity, and a 3-stage balanced equalization system, the FG12 offers precise control and high-quality sound processing. Please read this manual thoroughly to ensure proper setup, operation, and maintenance of your new audio mixer.
Safety Instructions
- Read all instructions before operating the device.
- Keep the unit away from water or moisture to prevent electric shock.
- Do not place the unit near heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
- Only use attachments/accessories specified by the manufacturer.
- Unplug the unit during lightning storms or when unused for long periods.
- Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
- Ensure proper ventilation to prevent overheating.
Product Overview
The Depusheng FG12 is a versatile 12-channel audio mixer designed for professional sound control. It integrates advanced features for optimal audio performance and flexibility.
Key Features:
- 12 Mono Inputs: Equipped with XLR and 6.35mm LINE IN jacks for microphones and line-level instruments.
- 3-Stage Balanced Equalization: Independent adjustment for High, Mid, and Low frequencies on each channel.
- 24 DSP Effects with 99 Programs: A wide range of digital effects including Bright Hall, Warm Hall, Bright Room, Warm Room, Plate, Gate Reverb, Slap Reverb, Delay (2s), Delay Stereo, Delay PP, Delay Mod, Echo 1, Echo 2, Echo 3, Chorus, Flanger, Distortion, Wahwah, Tremolo, Pitch Shift, Hall+Delay, Delay+Chorus, Delay+Chorus+Reverb.
- USB Compatibility: Connects to external USB devices and computers for playback and recording (Plug and Play).
- Wireless Bluetooth Connection: Seamless audio streaming from Bluetooth-enabled devices.
- +48V Phantom Power: Supports condenser microphones.
- Digital Display: Clear indication of DSP effects and other settings.
- Individual Channel Faders: Precise control over each input channel.
Component Identification:
Refer to the diagram below for a visual guide to the mixer's controls and connections.

Figure 1: Depusheng FG12 Mixer Controls and Connections
- MIC Inputs (1-12): XLR connectors for microphones.
- LINE IN Inputs (1-12): 6.35mm (1/4 inch) jacks for line-level instruments or audio sources.
- GAIN Controller: Adjusts the input sensitivity for each channel.
- EQ (HIGH, MID, LOW): Treble, Alto (Mid), and Bass tone controllers for each channel.
- AUX1/AUX2 Controllers: Send signals to external effects processors or monitor mixes.
- PAN Controller: Adjusts the stereo position (left/right) of the channel signal.
- MUTE Button: Mutes the individual channel.
- Channel Volume Faders (1-12): Controls the output level of each channel.
- LCD Display: Shows DSP effect numbers, USB status, and other information.
- PROGRAM (PUSH) Knob: Selects and confirms DSP effects.
- MODE Button: Switches between different modes (e.g., USB, Bluetooth).
- REC Button: Initiates recording via USB.
- USB Interface: For connecting USB drives or a computer.
- +48V PHANTOM Button: Activates phantom power for condenser microphones.
- PHONES Level Controller: Adjusts headphone output volume.
- LED Light Level Indicators: Visual display of output levels.
- MP3 Display and Buttons: Controls for MP3 playback (Play/Pause, Next, Previous).
- FX Volume Fader: Controls the overall level of the effects send.
- MP3 Volume Fader: Controls the volume of the MP3/USB/Bluetooth input.
- LEFT/RIGHT Main Volume Faders: Controls the overall main stereo output volume.
- REC/AUX Outputs: RCA and 6.35mm jacks for recording and auxiliary sends.
- MAIN OUT: XLR and 6.35mm (1/4 inch) jacks for main stereo output.
- External Power Input Socket: Connects to the AC power adapter.
- Power Switch: Turns the unit ON/OFF.
Setup
1. Power Connection:
- Ensure the mixer's power switch is in the OFF position.
- Connect the provided AC power adapter to the External Power Input Socket on the rear of the mixer.
- Plug the power adapter into a suitable AC power outlet.
2. Connecting Audio Sources:
- Microphones: Connect microphones to the MIC inputs (XLR jacks). If using condenser microphones, press the +48V PHANTOM button to supply power.
- Line-Level Devices: Connect instruments (keyboards, guitars with preamps) or other audio devices (CD players, media players) to the LINE IN inputs (6.35mm jacks).
- Tape/External Playback: Use the TAPE REC (RCA) inputs for connecting external playback devices.
3. Connecting Output Devices:
- Main Output: Connect your main speakers or power amplifier to the MAIN OUT (XLR or 6.35mm jacks).
- Headphones: Plug your headphones into the PHONES jack for monitoring.
- Auxiliary Outputs: Use AUX1/AUX2 outputs to send signals to stage monitors or external effects processors.
4. USB Connection:
- To use the mixer as an audio interface with a computer, connect a USB cable from the mixer's USB INTERFACE to your computer. The mixer is plug-and-play, requiring no special drivers for basic functionality.
- To play MP3 files from a USB drive, insert the USB drive into the USB INTERFACE.

Figure 2: USB Connectivity for PC and external devices
5. Bluetooth Connection:
- Press the MODE button on the MP3 section until 'Bluetooth' mode is selected on the LCD display.
- On your Bluetooth-enabled device (smartphone, tablet), search for available devices and select 'Depusheng FG12' (or similar name) to pair.
- Once paired, you can stream audio wirelessly to the mixer.

Figure 3: Wireless Bluetooth Connection for audio streaming
Operating Instructions
1. Powering On:
- After all connections are made, turn on your main speakers/amplifier first, then turn on the Depusheng FG12 mixer using the Power Switch.
2. Adjusting Input Levels (Gain):
- For each active channel, speak into the microphone or play your instrument at its normal performance level.
- Adjust the GAIN Controller for that channel until the PEAK LED occasionally flashes, then back it off slightly. This ensures a strong signal without distortion.
3. Equalization (EQ):
- Use the HIGH, MID, and LOW EQ knobs to shape the tone of each channel.
- HIGH: Adjusts treble frequencies (e.g., 10kHz).
- MID: Adjusts mid-range frequencies (e.g., 2.5kHz).
- LOW: Adjusts bass frequencies (e.g., 100Hz).

Figure 4: 3-Stage Balanced Equalization for precise tone shaping
4. Pan Control:
- The PAN knob allows you to position the channel's sound within the stereo field (left to right).
5. Channel Volume:
- Use the individual Channel Volume Faders to set the relative volume of each input in the mix.
6. DSP Effects:
- The FG12 features 24 DSP effects with up to 99 programs.
- Turn the PROGRAM (PUSH) knob to scroll through the available effects (e.g., Bright Hall, Slap Reverb, Echo, Chorus, Flanger, Distortion, Wahwah, Tremolo, Pitch Shift, Hall+Delay, Delay+Chorus, Delay+Chorus+Reverb). The selected effect number will appear on the LCD display.
- Push the PROGRAM knob to confirm your selection.
- Adjust the FX Volume Fader to control the overall level of the applied effect.

Figure 5: Digital Display showing DSP effect selection (e.g., '24' for Delay+Chorus+Reverb)
7. MP3/USB/Bluetooth Playback:
- Once a USB drive is inserted or a Bluetooth device is paired, use the MP3 Display and buttons (Play/Pause, Next, Previous) to control playback.
- Adjust the MP3 Volume Fader to control the playback level.
8. Main Mix and Monitoring:
- Adjust the LEFT/RIGHT Main Volume Faders to control the overall output level to your main speakers.
- Monitor your mix using headphones, adjusting the PHONES Level Controller as needed.
Video Demonstration:
Video 1: Depusheng FG12 Mixer Features Overview, demonstrating inputs, EQ, DSP effects, and fader controls.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the mixer's surface. Avoid using abrasive cleaners or solvents.
- Dust Protection: Keep the mixer covered when not in use to prevent dust accumulation, especially on faders and knobs.
- Storage: Store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Management: Ensure cables are neatly organized and not under strain to prevent damage to connectors.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Power not connected; Main faders down; Channel faders down; Mute engaged; Incorrect input/output connection. | Check power supply; Raise Main and Channel faders; Disengage Mute; Verify all cables are correctly connected. |
| Distorted sound | Input gain too high; Output level too high; Faulty cable/microphone. | Reduce GAIN controller; Lower Main/Channel faders; Test with different cables/microphones. |
| Hum or noise | Ground loop; Unbalanced cables; Interference from other electronics. | Use balanced cables (XLR/TRS); Check grounding; Move mixer away from power sources or other electronic devices. |
| Phantom power not working | +48V button not pressed; Faulty microphone. | Ensure +48V PHANTOM button is pressed; Test with another condenser microphone. |
| Bluetooth not connecting | Mixer not in Bluetooth mode; Device not discoverable; Interference. | Press MODE button to select Bluetooth; Ensure your device's Bluetooth is ON and discoverable; Try re-pairing. |
Specifications
| Feature | Specification |
|---|---|
| Model | FG12 |
| Channels | 12 |
| Inputs | 12 x Mono (XLR/6.35mm Line In), Tape In (RCA) |
| Outputs | Main Out (XLR/6.35mm), AUX Out, Return, Phones |
| Equalization | 3-Band (High, Mid, Low) per channel |
| DSP Effects | 24 Effects (99 Programs) |
| Phantom Power | +48V |
| Connectivity | USB (Playback/Recording), Bluetooth |
| Power Source | AC (External Adapter) |
| Built-in Battery | No |
| Unit Dimensions (approx.) | 52cm (W) x 34cm (D) x 3.8cm (H, main body) |
| Unit Weight | 4.4 kg (9.7 lb) |
| Package Dimensions | 57cm (L) x 42cm (W) x 11cm (H) |
| Package Weight | 6.0 kg |
| Certification | CE |
User Tips
No specific user tips from reviews or Q&A were provided for this product. However, general tips for audio mixers include:
- Always start with all volume faders and gain knobs at their minimum settings before powering on to avoid sudden loud noises.
- Use balanced cables (XLR or TRS) whenever possible to minimize noise, especially for longer cable runs.
- Experiment with the DSP effects to find the best sound for your specific application.
- When connecting to a computer via USB, ensure your computer's audio settings are configured to use the mixer as the input/output device.
Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.





