Introduction
Welcome to the user manual for your new BOMGE 12-Channel Professional Mixer, model CT120S PRO (12Channel-99DSP). This mixer is designed for professional audio applications, offering a comprehensive set of features including a USB audio interface, USB-B recording, Bluetooth connectivity, and 99 built-in DSP effects. This manual provides detailed instructions on setting up, operating, maintaining, and troubleshooting your mixer to ensure optimal performance and longevity.
Please read this manual thoroughly before using the product and keep it for future reference.
Safety Information
To prevent electric shock, fire, or damage to the unit, please observe the following safety precautions:
- Power Source: Only use the specified power adapter or a compatible 5V power source. Ensure the voltage matches the requirements of the mixer.
- Water and Moisture: Do not expose the unit to rain or moisture. Do not place objects filled with liquids, such as vases, on the unit.
- Ventilation: Ensure proper ventilation. Do not block ventilation openings.
- Heat: Keep the unit away from heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Cleaning: Clean only with a dry cloth. Do not use liquid cleaners or aerosols.
- Servicing: Do not attempt to service this product yourself. Refer all servicing to qualified service personnel.
- Phantom Power: When using 48V phantom power for condenser microphones, ensure the microphone is connected before activating phantom power to prevent damage.
Package Contents
Please check that all items are present in the package:
- BOMGE 12-Channel Professional Mixer (CT120S PRO)
- Power Adapter (USB to USB-C cable and power brick, or similar 5V power supply)
- User Manual (this document)
If any items are missing or damaged, please contact your retailer.
Product Overview
The BOMGE CT120S PRO mixer features a compact design with a comprehensive set of controls for versatile audio mixing. Below is an overview of the main components and their functions.
Figure 1: Top view of the BOMGE CT120S PRO 12-Channel Professional Mixer, showcasing its compact design and array of input channels, faders, and control knobs.
Key Features and Controls:
- Input Channels: 12 channels supporting XLR and 6.35mm unbalanced jack inputs for microphones and line-level instruments. Each channel includes gain control, 3-band EQ, and effect send.
- 48V Phantom Power: A dedicated button to activate +48V phantom power for condenser microphones.
- 99 DSP Effects: Integrated 24-bit DSP sound processor with 99 selectable effects, controlled via a dedicated PROGRAM knob and display.
- USB/MP3 Player: USB-B port for direct connection to a PC for recording and playback, and a USB-A port for flash drives. Built-in controls for play/pause, track skipping, and mode switching.
- Bluetooth Connectivity: Wireless audio streaming from Bluetooth-enabled devices like smartphones and tablets.
- 3-Band Equalizer: Ultra-musical 3-band EQ (High, Mid, Low) on all channels for precise tone shaping.
- Main Output: XLR and 6.35mm jack outputs for connecting to amplifiers or powered speakers.
- Headphone Output: Dedicated headphone jack with volume control for monitoring.
- LED Level Meters: High-precision LED peak level indicators and a 10-segment stereo output level meter.
Figure 2: Detailed diagram illustrating the various controls and connection points on the BOMGE CT120S PRO mixer, including gain adjustment, 3-band EQ, AUX drive, L/R channel balance, volume faders, monitor buttons, USB/48V button, display, mode selection, DSP effect selection, and total output attenuation fader.
Specific Features in Detail:
Figure 3: Close-up view of the 24-bit 99 DSP Effects section. This image displays the range of effects available, including various room reverbs, hall reverbs, plate reverbs, karaoke effects, guitar chorus, male/female voice effects (echo, reverb), autowah, and delay effects.
The integrated DSP processor offers 99 distinct effects to enhance your audio. Use the PROGRAM knob to cycle through effects such as Warm Room, Bright Room, Hall, Chapel, Church, Plate, Karaoke, Guitar Chorus, Male/Female Voice Echo, Male/Female Voice Reverb, Autowah, Pingpong Delay, and Long Delay. The selected effect number is shown on the digital display.
Figure 4: Image highlighting the 48V Phantom Power feature. A hand is shown pressing the 48V button next to a condenser microphone, indicating its use for providing stable and reliable voltage to compatible microphones.
The +48V phantom power supply is essential for operating condenser microphones. Ensure your microphone is securely connected to an XLR input before engaging the 48V phantom power button to prevent any potential damage to the microphone or mixer.
Figure 5: Depiction of the Wireless Bluetooth streaming capability. A smartphone displaying a music app is shown next to the mixer, with a Bluetooth logo indicating seamless wireless audio playback directly to the console unit.
The mixer supports hassle-free wireless audio streaming via Bluetooth. Pair your smartphone, tablet, or other Bluetooth-enabled device to play music directly through the mixer's output. This feature is ideal for background music or playing tracks during live performances.
Figure 6: Close-up of the 3-Band EQ section. A hand is shown adjusting the knobs for High, Middle, and Low frequencies, emphasizing the ultra-musical equalization available on all channels for precise sound shaping.
Each input channel is equipped with a 3-band equalizer, allowing you to adjust the High, Mid, and Low frequencies of your audio signals. This provides precise control over the tone of individual microphones or instruments, helping you achieve a balanced and clear mix.
Figure 7: This image details various aspects of the mixer's design and functionality. It shows the HD screen display for clear status indication, the Mic/Stereo Line Inputs supporting XLR and 1/4" plugs, and the damping sense buttons for precise control and tactile feedback.
The mixer features a clear HD screen display for easy monitoring of settings and DSP effects. It supports both XLR and 1/4" jack inputs for microphones and line-level signals. The rotary controls are designed with a damping sense for excellent tactile feedback and resistance to dust, ensuring durability and precise adjustments.
Figure 8: Illustration of the 5V power supply options for the BOMGE CT120S PRO mixer. It shows the mixer being powered by a rechargeable battery bank, a standard wall adapter, and a computer via USB, highlighting its versatile power input capabilities.
The mixer operates on a 5V power supply, offering flexibility in power sources. It can be powered via the included power adapter, a compatible USB power bank (2000mAh or higher recommended), or directly from a computer's USB port, making it suitable for various setups and portable use.
Setup
- Power Connection: Connect the provided 5V power adapter to the mixer's power input (DC 5V) and plug it into a suitable power outlet. Alternatively, connect a compatible USB power bank or a computer via the USB-B port for power.
- Main Output Connection: Connect the main output (XLR or 6.35mm jacks) of the mixer to your amplifier, powered speakers, or recording device.
- Input Connections:
- Microphones: Connect dynamic microphones to the XLR or 6.35mm inputs. For condenser microphones, connect them to the XLR inputs and then activate the +48V phantom power button.
- Instruments/Line Devices: Connect instruments (e.g., keyboards, guitars with preamps) or other line-level devices to the 6.35mm line inputs.
- USB Devices: Insert a USB flash drive into the USB-A port for MP3 playback. Connect the mixer to a computer via the USB-B port for use as an audio interface for recording and playback.
- Headphones: Connect your headphones to the dedicated headphone jack for monitoring.
- Initial Power On: Ensure all connections are secure and all volume faders are at their minimum position before powering on the mixer. Turn on the mixer using the power switch.
Operating
Basic Operation:
- Gain Adjustment: Use the GAIN knob on each channel to set the input level. Adjust until the peak LED occasionally flashes, but does not stay lit, to avoid clipping.
- Equalization: Use the HIGH, MID, and LOW knobs on each channel to adjust the treble, midrange, and bass frequencies of the input signal.
- Channel Volume: Use the channel faders to control the individual volume of each input.
- Main Output Volume: Use the main L/R faders to control the overall output volume. Monitor the 10-segment LED meter to ensure levels are optimal.
DSP Effects:
- Selecting Effects: Turn the PROGRAM knob in the DSP section to cycle through the 99 available effects. The display will show the effect number.
- Applying Effects: Use the FX send knob on each channel to send a portion of that channel's signal to the DSP effects processor. Adjust the FX RETURN knob to control the overall level of the effects in the main mix.
USB/Bluetooth Playback and Recording:
- USB Flash Drive Playback: Insert a USB flash drive with MP3 files into the USB-A port. Use the built-in controls (Play/Pause, Prev, Next, Mode) to navigate and play tracks.
- Bluetooth Pairing: Select Bluetooth mode on the mixer. On your device, search for "BOMGE Mixer" (or similar) and pair. Once connected, you can stream audio wirelessly.
- USB Audio Interface (PC Connection): Connect the mixer to your computer via the USB-B port. The mixer will be recognized as an audio device. You can then use your preferred DAW (Digital Audio Workstation) software to record the mixer's output or play audio from your computer through the mixer.
Maintenance
- Cleaning: Regularly wipe the mixer's surface with a soft, dry cloth. Do not use abrasive cleaners, solvents, or waxes.
- Storage: When not in use for extended periods, store the mixer in a cool, dry place, away from direct sunlight and extreme temperatures.
- Dust Protection: Keep the mixer covered when not in use to prevent dust accumulation, especially on faders and knobs.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected properly; faulty power adapter; insufficient power from USB source. | Ensure power cable is securely connected. Try a different power outlet or USB power source (e.g., a wall adapter instead of a low-power USB port). Verify the power source provides sufficient current (e.g., 2000mAh for power banks). |
| No sound output | Main faders are down; input gain too low; output device (amplifier/speakers) off or disconnected; incorrect input selection. | Increase main L/R faders. Check channel faders and gain knobs. Ensure amplifier/speakers are on and connected. Verify correct input source is selected on the mixer (e.g., USB, Bluetooth, or specific channel). |
| No sound from microphone | Gain too low; 48V phantom power not activated (for condenser mics); faulty microphone or cable. | Increase channel gain. Activate +48V phantom power if using a condenser microphone. Test with a different microphone or cable. |
| Bluetooth not connecting | Mixer not in Bluetooth mode; device not in pairing mode; interference. | Ensure the mixer is in Bluetooth mode. Put your device in pairing mode and search for the mixer. Move closer to the mixer and away from other wireless devices. |
| Feedback/Humming noise | Improper gain staging; ground loop; microphone too close to speakers; internal routing issues (e.g., USB return feeding back into main mix). | Reduce gain levels. Check for ground loops (try different outlets). Reposition microphones away from speakers. If using as a USB interface, ensure your DAW or computer audio settings are not routing the output back into the mixer's input, or use a mix-minus setup if available. |
Specifications
| Feature | Detail |
|---|---|
| Model Number | 12Channel-99DSP |
| Product Dimensions (L x W x H) | 37.5 x 34 x 3.7 cm (14.76 x 13.39 x 1.46 inches) |
| Item Weight | 1.34 Kilograms (2.95 lbs) |
| Number of Channels | 12 |
| DSP Effects | 99 (24-bit processor) |
| Phantom Power | +48V |
| Connectivity Technology | Bluetooth, USB |
| Power Source | Electric Cable (5 Volts) |
| Audio Input Type | XLR, 1/4" jack |
| Output Connector Type | XLR |
| UPC | 768447426714 |
| ASIN | B0CDZW8V9K |
Warranty and Support
BOMGE products are manufactured to high-quality standards. For information regarding warranty coverage, technical support, or service inquiries, please refer to the warranty card included with your product or visit the official BOMGE website. Please retain your proof of purchase for any warranty claims.
For troubleshooting beyond the scope of this manual, or for replacement parts, please contact BOMGE customer support or your authorized dealer.
