1. Introduction
Thank you for choosing the MONTARBO Wide-123 Active Loudspeaker. This manual provides essential information for the safe and efficient operation of your new audio equipment. Please read this manual thoroughly before use and retain it for future reference.
The MONTARBO Wide-123 is a high-performance 650W active loudspeaker featuring a 12-inch driver, designed for professional audio applications. Its robust construction and advanced DSP ensure clear and powerful sound reproduction.
2. Safety Instructions
To prevent electric shock, fire, or damage to the unit, please observe the following safety precautions:
- Power Source: Connect the unit only to an AC power outlet of the specified voltage.
- Grounding: Ensure the power cord is properly grounded to prevent electrical hazards.
- Ventilation: Do not block ventilation openings. Ensure adequate airflow around the unit to prevent overheating.
- Water and Moisture: Do not expose the unit to rain or moisture. Do not place objects filled with liquids on the unit.
- Heat Sources: Keep the unit away from heat sources such as radiators, heat registers, stoves, or other apparatus that produce heat.
- Handling: Use caution when moving the unit. Always lift with appropriate support.
- Servicing: Do not attempt to service this unit yourself. Refer all servicing to qualified service personnel.
3. Package Contents
Please check that your package contains the following items:
- MONTARBO Wide-123 Active Loudspeaker
- Power Cable
- User Manual (this document)
If any items are missing or damaged, please contact your dealer immediately.
4. Product Overview
The MONTARBO Wide-123 is an active loudspeaker designed for clarity and power. It features a robust birch plywood enclosure and a protective metal grille.

Figure 1: Front-side view of the MONTARBO Wide-123 Active Loudspeaker. The image shows the speaker's black textured finish, the front metal grille protecting the speaker components, and a recessed handle on the side for portability. The Montarbo logo is visible on the lower front grille.
Key Features:
- Amplification: Class-D amplifier with switching power supply.
- Digital Signal Processing (DSP): Montarbo DSP 56-bit, 24-bit AD/DA conversion.
- Speakers: 12-inch Neodymium woofer with 3-inch voice coil, and a 1-inch driver with 2.4-inch voice coil and Titanium Diaphragm.
- Horn: 1-inch Wave Guide horn with 80°x60° dispersion.
- Connectivity: XLR Line-In, XLR Link Out, XLR Sub Out, Montarbo net via RJ45.
- Controls: Input Volume, Preset Select.
5. Setup
5.1 Placement
Position the loudspeaker on a stable, flat surface or a compatible speaker stand. Ensure the speaker is placed in a location that allows for optimal sound dispersion and does not obstruct ventilation. Avoid placing the speaker in direct sunlight or near heat sources.
5.2 Power Connection
- Ensure the speaker's power switch is in the OFF position.
- Connect the supplied power cable to the AC inlet on the rear panel of the speaker.
- Plug the other end of the power cable into a suitable grounded AC power outlet.
5.3 Audio Connection
Use high-quality XLR cables to connect your audio source (e.g., mixer, instrument) to the XLR Line-In connector on the speaker's rear panel.
- XLR Line-In: For connecting the main audio signal from your source.
- XLR Link Out: For daisy-chaining multiple Wide-123 speakers or sending the signal to another active speaker.
- XLR Sub Out: For connecting to an active subwoofer, providing a filtered signal for low frequencies.
5.4 Network Connection (Optional)
The speaker features an RJ45 port for connection to a Montarbo network, allowing for advanced control and monitoring. Refer to specific Montarbo network documentation for detailed setup.
6. Operating
6.1 Powering On/Off
- Before powering on, ensure all connections are secure and the Input Volume control is set to its minimum position.
- Flip the power switch to the ON position. The power indicator LED will illuminate.
- To power off, first reduce the Input Volume to minimum, then flip the power switch to the OFF position.
6.2 Volume Adjustment
Use the 'Input Vol' control knob on the rear panel to adjust the overall output volume of the speaker. Start with a low volume and gradually increase it to the desired level, monitoring for any distortion.
6.3 Preset Selection
The 'Preset Select' control allows you to choose from various DSP presets optimized for different applications (e.g., live music, speech, DJ). Refer to the specific DSP documentation for details on each preset's characteristics.
7. Maintenance
7.1 Cleaning
Regularly clean the exterior of the speaker with a soft, dry cloth. Do not use abrasive cleaners, solvents, or waxes. For the metal grille, a soft brush can be used to remove dust. Ensure no liquids enter the speaker enclosure.
7.2 Storage
When not in use for extended periods, store the speaker in a dry, dust-free environment, away from extreme temperatures and humidity. It is recommended to use a protective cover.
8. Troubleshooting
If you encounter issues with your MONTARBO Wide-123, refer to the following common problems and solutions:
- No Power:
- Check if the power cable is securely connected to both the speaker and the AC outlet.
- Verify that the AC outlet is functioning (test with another device).
- Ensure the power switch on the speaker is in the ON position.
- No Sound:
- Confirm the audio source is active and sending a signal.
- Check the XLR cable connections between the source and the speaker.
- Ensure the 'Input Vol' control on the speaker is not set to minimum.
- Verify that the audio source's volume is turned up.
- Distorted Sound:
- Reduce the 'Input Vol' on the speaker and/or the output level from your audio source.
- Check for damaged audio cables.
- Ensure the speaker is not overdriven.
If the problem persists after attempting these solutions, please contact Montarbo customer support or a qualified service technician.
9. Specifications
| Feature | Specification |
|---|---|
| Concept | Active Loudspeaker |
| Amplifier Type | Class-D with switching power supply |
| Electronics | Montarbo DSP 56 bit, 24 bit AD/DA |
| Power (EIAJ) | 500W + 150W |
| Maximum Sound Pressure Level (SPL) | 132 dB |
| Woofer | 12-inch Neodymium, 3-inch voice coil |
| Horn | 1-inch Wave Guide horn |
| Driver | 1-inch driver, 2.4-inch voice coil, Titanium Diaphragm |
| Dispersion Angle | 80° x 60° |
| Frequency Response | 60 Hz - 20 kHz |
| Crossover Frequency | 1400 Hz |
| Enclosure | Birch plywood, textured finish |
| Connections | XLR Line-In, XLR Link Out, XLR Sub Out, RJ45 (Montarbo net) |
| Controls | Input Vol, Preset Select |
| Dimensions (W x H x D) | 366 x 590 x 383 mm |
| Weight | 23 kg |
| Power Source | Corded Electric |
10. Warranty and Support
Montarbo products are manufactured to high standards and are covered by a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Montarbo website.
For technical support, service, or spare parts, please contact your authorized Montarbo dealer or Montarbo customer service directly. When contacting support, please have your product model (Wide-123) and serial number available.







