1. Introduction
The BOMGE BMG11S is a professional-grade USB audio interface designed for high-fidelity, studio-quality recording. It offers up to 24-bit/192kHz resolution, a built-in microphone pre-amplifier, and 48V phantom power, making it suitable for guitarists, vocalists, podcasters, and producers. This manual provides essential information for setting up, operating, and maintaining your BMG11S audio interface.
2. Safety Information
- Do not expose the device to rain, moisture, or extreme temperatures.
- Avoid placing the device near heat sources or in direct sunlight.
- Do not open the casing; there are no user-serviceable parts inside. Refer all servicing to qualified personnel.
- Use only the specified power supply (USB bus power).
- Keep the device away from strong electromagnetic fields.
- Ensure proper ventilation to prevent overheating.
3. Product Overview
3.1 Key Features
- 24-bit/192kHz audio resolution for clear, detailed sound.
- High-grade professional mic pre-amplifier.
- 48V phantom power for condenser microphones.
- Direct monitoring for zero-latency playback.
- Plug-and-play compatibility with Mac OS and Windows XP or later.
- USB bus-powered, no external power supply required.
- Compatible with popular recording software like Audacity, Ableton Live, Cubase, etc.
3.2 Controls and Connections (Front Panel)
Image: Front view of the BOMGE BMG11S USB Audio Interface, showing inputs, gain knobs, and monitoring controls.
- Input 1 (XLR/TRS Combo Jack): Connect microphones (XLR) or line-level instruments (1/4" TRS).
- Gain 1 Knob: Adjusts the input level for Input 1.
- 48V Button: Activates phantom power for condenser microphones connected to Input 1. An indicator light will illuminate when active.
- Input 2 (TRS Jack): Connect line-level instruments (1/4" TRS).
- Gain 2 Knob: Adjusts the input level for Input 2.
- INST Button: Engages high-impedance mode for direct instrument connection (e.g., guitar) to Input 2.
- Direct Monitor Button: Enables zero-latency monitoring of your input signals directly through the headphone and main outputs.
- Monitor Knob: Controls the overall output level for headphones and line outputs.
- Headphone Output (TRS Jack): Connect headphones for monitoring.
3.3 Connections (Rear Panel)
Image: Rear view of the BOMGE BMG11S USB Audio Interface, illustrating the USB connection and line outputs.
- USB Port: Connects the interface to your computer for data transfer and power.
- Line Outputs (Right/Left): Connect to studio monitors or other playback systems using 1/4" TRS cables.
4. Setup
4.1 Driver Installation
For optimal performance and compatibility, especially on Windows systems, it is recommended to install an ASIO driver. While the BMG11S is plug-and-play, a dedicated ASIO driver like ASIO4ALL (freeware) can significantly improve latency and stability with recording software. Download and install the appropriate driver for your operating system from the manufacturer's website or a reputable source.
4.2 Connecting to Your Computer
- Connect the USB cable from the BMG11S to an available USB port on your computer. The device will be powered via USB.
- Allow your operating system to recognize and install the necessary basic drivers.
4.3 Connecting Audio Devices
Image: Connection diagram for microphones, keyboards, guitars, and headphones to the front panel of the BMG11S.
- Microphone: Connect an XLR microphone to Input 1. If using a condenser microphone, press the 48V button to supply phantom power.
- Instrument (e.g., Guitar): Connect a 1/4" TS cable from your instrument to Input 2. Press the INST button for optimal impedance matching.
- Headphones: Connect your headphones to the Headphone Output jack.
- Studio Monitors/Speakers: Connect the Line Outputs (Right and Left) on the rear panel to your active studio monitors or amplifier using 1/4" TRS cables.
5. Operating Instructions
5.1 Adjusting Input Gain
Turn the GAIN knobs (1 and 2) clockwise to increase the input level for the corresponding input. Observe the 'SIG' (Signal) indicator lights. Aim for a strong signal without clipping (distortion). If the 'SIG' light turns red, reduce the gain.
5.2 Activating Phantom Power
If using a condenser microphone, press the 48V button. The red 48V indicator light will illuminate, supplying power to the microphone. Ensure the microphone is connected before activating phantom power.
5.3 Direct Monitoring
Press the DIRECT MONITOR button to enable zero-latency monitoring. This allows you to hear your input signal directly through your headphones and main outputs without any delay from your computer's software. This is crucial for recording to avoid timing issues.
5.4 Adjusting Output Volume
Use the MONITOR knob to control the overall output volume for both your headphones and the line outputs connected to your speakers.
5.5 Recording with Software
Once connected and drivers are installed, open your preferred Digital Audio Workstation (DAW) or recording software (e.g., Audacity, Ableton Live, Cubase). Select the BOMGE BMG11S as your audio input and output device within the software's audio settings. You can then arm tracks for recording and begin capturing audio.
Video: A demonstration of the BOMGE BMG11S USB Audio Interface, including recording tests with an SM58 microphone and a condenser microphone, and showing connections.
6. Maintenance
- Clean the exterior of the device with a soft, dry cloth. Do not use liquid cleaners or solvents.
- Keep the connectors free from dust and debris.
- Store the interface in a cool, dry place when not in use.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output/input | Incorrect driver, incorrect software settings, loose cables, low gain. | Verify driver installation. Check audio settings in your DAW. Ensure all cables are securely connected. Increase gain levels. Check MONITOR knob. |
| Distortion or clipping | Input gain too high. | Reduce the GAIN knob for the affected input until the 'SIG' light no longer turns red. |
| Buzzing or unwanted noise | Ground loop, faulty cable, interference, low-quality power supply (though bus-powered, computer's USB power can vary). | Try a different USB port or computer. Ensure all connections are secure. Use high-quality shielded cables. If using a laptop, try running on battery power to rule out power supply issues. |
| High latency during recording | No ASIO driver (Windows), incorrect buffer size in DAW. | Install an ASIO driver (e.g., ASIO4ALL) on Windows. In your DAW's audio settings, reduce the buffer size. Use the Direct Monitor function. |
| 48V phantom power not working | 48V button not pressed, faulty microphone. | Ensure the 48V button is pressed and its indicator light is on. Test with another condenser microphone if possible. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | BOMGE |
| Model | BMG11S |
| Connectivity Technology | XLR, USB |
| Number of Channels | 2 |
| Maximum Sample Rate | 192 KHz |
| Audio Input | Microphone, Musical Instrument, Guitar |
| Compatible Devices | Personal Computer, Android |
| Operating System | Linux, Windows 10 and above, Mac OS, Android |
| Supported Software | GarageBand, Cubase, Logic Pro, Reaper, Reason, Ableton Live, FL Studio, Studio One, Audition, OBS |
| Item Weight | 0.48 Kilograms |
9. Warranty Information
The BOMGE BMG11S USB Audio Interface comes with a 90-day warranty from the date of purchase. This warranty covers manufacturing defects. Please retain your proof of purchase for warranty claims. The warranty does not cover damage caused by misuse, accidents, unauthorized modifications, or normal wear and tear.
10. Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact BOMGE customer support through the retailer where you purchased the product or visit the official BOMGE website for contact information. Please have your product model number (BMG11S) and proof of purchase ready when contacting support.