1. Introduction
This manual provides detailed instructions for the proper setup, operation, and maintenance of your BOMGE 04M Audio Mixer. Please read this manual thoroughly before using the device to ensure optimal performance and to prevent damage. Keep this manual for future reference.
2. Safety Information
- Do not expose this device to rain or moisture to avoid fire or electric shock.
- Do not open the casing. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
- Ensure the power supply voltage matches the requirements specified on the unit.
- Avoid placing the unit near heat sources or in direct sunlight.
- Disconnect the power adapter during lightning storms or when unused for long periods.
- Use only attachments/accessories specified by the manufacturer.
3. Package Contents
Verify that all items are present in the package:
- BOMGE 04M Audio Mixer
- Power cable
- USB to USB cable
- User Manual (this document)
4. Product Overview: Controls and Connections
The BOMGE 04M is a compact yet feature-rich audio mixer designed for various applications including recording, live streaming, podcasting, and gaming. It features a durable metal enclosure for protection.
Image: A detailed diagram illustrating the various controls, inputs, and outputs on the BOMGE 04M Audio Mixer, color-coded for clarity.
4.1 Input Channels (CH 1 & CH 2)
- MIC/LINE (XLR + 6.35mm Combo Jack): Connect microphones (XLR) or line-level instruments (6.35mm TRS/TS).
- PAD Button (-20dB): Attenuates the input signal by 20dB for high-sensitivity sources like guitars or electronic musical instruments.
- +48V Phantom Power: Supplies power to condenser microphones. Activated globally for both channels.
- GAIN Knob: Adjusts the input sensitivity for each channel.
- HIGH/MID/LOW EQ Faders: 3-band equalizer to adjust the treble, midrange, and bass frequencies of each channel.
- FX Knob: Controls the amount of effect sent from the channel to the internal DSP effect processor.
- LEVEL Knob: Adjusts the output volume of the individual channel.
4.2 Other Inputs
- 2-TRACK IN (RCA): Stereo RCA inputs for connecting external playback devices.
- AUX IN (3.5mm): Auxiliary input for connecting portable audio players.
- USB Port: For U-disk playback/recording and connection to a computer.
4.3 Outputs
- MAIN OUTPUTS (XLR & 6.35mm TRS): Balanced stereo outputs for connecting to amplifiers or powered speakers. Note: Do not connect directly to passive speakers.
- PHONES (6.35mm & 3.5mm): Dual headphone outputs for monitoring.
- 2-TRACK OUT (RCA): Stereo RCA outputs for recording.
4.4 Master Section Controls
- DSP/FX Section: Controls for selecting and adjusting the 24 built-in digital effects.
- USB/Bluetooth Section: Controls for U-disk playback (Play/Pause, Skip Tracks, Mode) and Bluetooth pairing.
- MAIN SECTION Fader: Controls the overall output volume of the mixer.
- PK/SIG LEDs: Peak and Signal indicators for the main output.
5. Setup
5.1 Power Connection
Connect the provided power cable to the 5V DC input on the mixer and plug it into a suitable power source. The mixer supports 5V charging from various sources, including a computer USB port, a power bank, or a standard USB charger.
Image: Demonstrates connecting the 5V power supply to the mixer, highlighting compatibility with computers, power banks, and wall chargers.
5.2 Connecting Microphones
For dynamic microphones, connect via the XLR or 6.35mm jack on CH 1 or CH 2. For condenser microphones requiring phantom power, connect via the XLR jack and activate the +48V Phantom Power switch.
Image: A hand adjusting a control on the mixer, emphasizing the 48V phantom power capability for condenser microphones.
5.3 Connecting Line-Level Devices
Connect instruments or other audio sources to the 6.35mm LINE inputs on CH 1/2, or use the 2-TRACK IN (RCA) or AUX IN (3.5mm) for stereo playback devices.
Image: A detailed view of the mixer's input section, showing the 6 input options for microphones, line-level devices, and auxiliary sources.
5.4 Connecting to Output Devices
Connect the MAIN OUTPUTS (XLR or 6.35mm TRS) to an amplifier or powered speakers. Ensure the amplifier is powered off before connecting. Important: This mixer cannot directly power passive speakers.
5.5 USB Connection for PC/U-disk
Connect the mixer to a computer using the provided USB cable for audio interface functionality. Alternatively, insert a U-disk into the USB port for MP3/WAV/Lossless APE/FLAC playback or recording.
5.6 Bluetooth Pairing
Activate Bluetooth on your smartphone, tablet, or other device. On the mixer, select Bluetooth mode using the USB/Bluetooth controls. Search for the mixer's Bluetooth name (e.g., "BOMGE Mixer") on your device and pair. A confirmation sound or indicator will show successful connection.
Image: The compact mixer shown with a laptop and a smartphone, demonstrating its USB and Bluetooth connectivity features.
6. Operating Instructions
6.1 Basic Operation
- Power on the mixer after all connections are made.
- Ensure all GAIN and LEVEL knobs are at their minimum positions before playing audio.
- Gradually increase the GAIN for each input channel until the signal indicator (SIG) lights consistently without peaking (PK).
- Adjust individual channel LEVEL knobs to balance the mix.
- Slowly raise the MAIN SECTION fader to achieve the desired overall output volume.
6.2 Equalization (EQ) Adjustment
Use the HIGH, MID, and LOW faders on channels 1 and 2 to shape the tone of your audio. Adjust these to enhance or cut specific frequencies for a clearer or more desired sound.
Image: A hand manipulating the 3-band equalization faders (High, Mid, Low) on the mixer, illustrating the tone adjustment capability.
6.3 DSP Effects
The mixer features 24 built-in digital sound effects. Use the DSP/FX section to select and apply effects.
- DSP+ / DSP- Buttons: Cycle through the available effects.
- FX Level Knob: Adjusts the overall return level of the selected effect.
- Channel FX Knob: Controls how much of each channel's signal is sent to the effect processor.
Available effects include:
Image: A table listing the 24 DSP effects, categorized into voice changers, magic sound, child's voice, and various delay and echo combinations.
6.4 USB Audio Interface (Playback & Recording)
- U-disk Playback: Insert a U-disk with audio files (MP3/WAV/Lossless APE/FLAC). Use the Play/Pause, Skip Tracks, and Mode buttons in the USB/Bluetooth section to control playback.
- Recording to U-disk/PC: Press the REC button to start recording to an inserted U-disk. When connected to a PC, the mixer acts as an audio interface, allowing recording directly to your computer's software.
6.5 Headphone Monitoring
Connect headphones to either the 3.5mm or 6.35mm PHONES jack. Adjust the PHONES level knob to control the monitoring volume. This allows you to listen to the mix without affecting the main output.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the mixer. Do not use liquid cleaners or solvents.
- Storage: Store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
- Cable Management: Avoid sharp bends or kinks in cables to prevent damage.
8. Troubleshooting
- No Sound Output:
- Check all cable connections (inputs, outputs, power).
- Ensure all GAIN and LEVEL knobs, including the MAIN SECTION fader, are turned up.
- Verify that the connected amplifier or powered speakers are on and functioning correctly.
- If using phantom power, ensure it is activated for condenser microphones.
- Humming or Noise:
- Check for ground loops. Try connecting the mixer and other audio equipment to the same power outlet or a power conditioner.
- Ensure all cables are properly shielded and in good condition.
- Reduce GAIN levels if they are too high, as this can introduce noise.
- Bluetooth Connection Issues:
- Ensure the mixer is in Bluetooth mode.
- Delete the mixer from your device's Bluetooth history and try pairing again.
- Ensure your device is within range of the mixer.
- Recording in Mono (when expecting Stereo):
- When recording to a computer, check the settings in your Digital Audio Workstation (DAW) or recording software to ensure it is configured for stereo input from the USB audio interface.
- Verify that the source material being recorded is indeed stereo.
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | 04M |
| Number of Channels | 4 |
| Connectivity Technology | Auxiliary, Bluetooth, USB |
| Power Source | Corded Electric |
| Voltage | 5 Volts |
| Item Weight | 1.1 Kilograms (2.42 pounds) |
| Product Dimensions | 7.4"D x 7.2"W x 1.5"H (7.4 x 7.2 x 1.5 inches) |
| Phantom Power | +48V |
| DSP Effects | 24 built-in effects (Voice Changer, Delay, Echo+Delay, etc.) |
10. Warranty Information
BOMGE products are designed and manufactured to the highest quality standards. This product is covered by a limited warranty against defects in materials and workmanship. Please refer to the warranty card included with your purchase or contact BOMGE customer support for specific warranty terms and conditions.
11. Support
For technical assistance, troubleshooting, or further inquiries, please visit the official BOMGE website or contact their customer support team. Contact information can typically be found on the product packaging or the BOMGE brand store online.
