Introduction
Thank you for choosing the BOMGE S4 Professional 4 Channel Audio Mixer. This portable digital sound board mixing console is designed for versatility, offering USB and Bluetooth connectivity, along with 48V phantom power for professional audio applications. This manual provides essential information for setting up, operating, and maintaining your mixer to ensure optimal performance.
Safety Information
- Read all instructions carefully before use.
- Do not expose the device to rain or moisture.
- Do not open the casing; refer all servicing to qualified personnel.
- Ensure proper ventilation to prevent overheating.
- Use only the specified power source (DC via Micro USB).
- Keep out of reach of children.
Package Contents
Please check that all items are present:
- BOMGE S4 Professional 4 Channel Audio Mixer
- USB Power Cable (Note: Power adapter is not included)
- User Manual (this document)
Product Overview
The BOMGE S4 mixer features a compact design with comprehensive controls for various audio mixing needs.
Figure 1: BOMGE S4 Mixer Interfaces
Key Features:
- 4-Channel Mixing: Two XLR/Line inputs and two stereo line inputs.
- 48V Phantom Power: Available for condenser microphones on XLR inputs.
- USB Audio Interface: Connects to computers, mobile phones, or tablets for recording and playback.
- USB-A Port: For USB stick playback of MP3s and recording audio output.
- Bluetooth Connectivity: Wireless audio streaming from compatible devices.
- 2-Band EQ: High and Low frequency adjustment for each channel.
- Effects: Built-in Echo and Delay.
- Headphone Monitor: Dedicated 6.35mm jack for real-time audio monitoring.
- Micro USB Power: Versatile power input options.
Setup
Powering the Mixer
Connect the provided USB power cable to the Micro USB port on the mixer. The mixer can be powered by a computer, a standard USB power adapter (not included), or a power bank.
Figure 2: Power Input Options
Video 1: Demonstrating power input and Bluetooth pairing.
Connecting Input Devices
- Microphones/Guitars: Use the XLR/Line input jacks (channels 1 and 2) for microphones (condenser or wired) or guitars. For condenser microphones, activate the 48V Phantom Power switch if required.
- Stereo Devices: Connect CD players, keyboards, or computers to the L/R 6.35mm or L/R RCA stereo inputs (channels 3/4).
Figure 3: Connecting a Condenser Microphone with 48V Phantom Power
Connecting Output Devices
- Main Output: Connect active speakers, power amplifiers, or active sound systems to the L/R 6.35mm Main output jacks.
- Headphones: Plug headphones into the 6.35mm PHONES jack for monitoring.
USB Audio Interface Connection
Connect the mixer's USB-B port to your computer, mobile phone, or tablet for mixing and recording. For mobile phones, a USB to Phone OTG Adapter is required for data transfer.
Bluetooth Connection
To stream audio wirelessly:
- Ensure the mixer is powered on.
- On your device (phone, tablet, computer), enable Bluetooth and search for available devices.
- Select the mixer (e.g., "MIX-MP3 BT") from the list to pair.
- Once paired, you can stream music to the mixer from your device. Bluetooth works within a range of approximately 35 feet (10 meters).
Figure 4: USB Audio and Bluetooth Interface
Operating Instructions
Adjusting Input Gain
Use the 'GAIN' knobs for each channel to adjust the input sensitivity. This helps prevent clipping and ensures a strong, clear signal.
2-Band EQ Adjustment
Each channel features 'HIGH' and 'LOW' EQ knobs. Turn these to adjust the treble and bass frequencies of the respective input signal.
Figure 5: 2-Band EQ Adjustment
Applying Effects (Echo/Delay)
Use the 'EFF' (Effect) knob to control the amount of effect (echo/delay) applied to the channel. The 'DEL' and 'REP' knobs in the master section adjust the delay time and repetition of the effect.
Volume Control
- Channel Volume: Use the 'VOLUME' knobs for each channel to adjust its individual output level.
- Main Volume: The 'MAIN' knob controls the overall output volume of the mixer.
Monitoring Audio
Connect headphones to the 'PHONES' jack to monitor the mixed audio in real-time. Adjust the headphone volume as needed.
Figure 6: Real-time Headphone Monitoring
USB Stick Playback and Recording
- Playback: Insert a USB stick with MP3 music into the USB-A port. Use the built-in controls (Play/Pause/switch songs) to manage playback.
- Recording: The mixer can record the audio output directly to a connected USB stick. Refer to the display and controls for recording functions.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the mixer's surface. Do not use liquid cleaners or solvents.
- Storage: Store the mixer in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Avoid dropping or subjecting the mixer to strong impacts.
- Cable Care: Ensure all cables are connected and disconnected gently to prevent damage to ports.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | USB power cable not connected or faulty; power source issue. | Ensure USB cable is securely connected. Try a different USB port or power adapter. |
| No sound output | Volume knobs are low; incorrect input/output connections; faulty cables. | Check all volume knobs (channel and main). Verify input and output cables are correctly connected. Test with different cables. |
| Microphone not working | 48V Phantom Power not enabled for condenser mic; gain too low; mic faulty. | Activate 48V Phantom Power if using a condenser mic. Increase gain. Test with another microphone. |
| Bluetooth connection issues | Device too far; interference; mixer not in pairing mode. | Ensure device is within 35ft. Restart both mixer and Bluetooth device. Re-attempt pairing. |
| Cannot record to USB stick | USB stick full or incompatible format; recording function not activated. | Check USB stick capacity and format (FAT32 recommended). Ensure recording mode is selected on the mixer. |
| Output device not working via Bluetooth | Attempting to connect an output device via Bluetooth. | The mixer's Bluetooth is for input only. Output devices must be connected via wired connections (e.g., 6.35mm Main output). |
Specifications
| Feature | Detail |
|---|---|
| Brand | BOMGE |
| Model Number | S4 |
| Type | Mixers |
| Channels | 4 (2 XLR/Line, 2 Stereo Line) |
| Power Source | DC (Micro USB) |
| Built-in Battery | No |
| Inbox Adaptor | No |
| Phantom Power | 48V (switchable for XLR inputs) |
| Connectivity | USB-A, USB-B, Bluetooth, XLR, 6.35mm, RCA |
| Equalization | 2-Band (High, Low) per channel |
| Effects | Echo, Delay |
| Dimensions (L x W x H) | 18.9cm (7.4in) x 15cm (5.9in) x 4.6cm (1.8in) |
| Weight | 0.599 kg |
| Origin | Mainland China |
| Certification | CE |
User Tips
- Mac Compatibility: The BOMGE S4 mixer functions with Mac operating systems as a standard USB audio interface, typically requiring no special drivers.
- Mobile Recording: When connecting to a mobile phone for recording, ensure you use a USB to Phone OTG (On-The-Go) adapter for proper data transfer.
- Active Speakers Only: Remember that the mixer's main outputs are designed for active speakers, power amplifiers, or active sound systems. Passive speakers will require an external amplifier.
- Bluetooth Input Only: The Bluetooth feature is for receiving audio from your devices (e.g., phone, tablet) into the mixer. It cannot be used to send audio from the mixer to Bluetooth output devices.
Warranty and Support
For warranty information and technical support, please refer to the seller's specific terms and conditions or contact their customer service directly. Keep your purchase receipt as proof of purchase.
