Bose MA12EX Manual

The Bose MA12EX is a modular line array loudspeaker system designed for professional sound reinforcement applications. It features weather-resistant construction, wide dispersion, and modular expansion capabilities. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Modular line array enclosure, weather-resistant design, wide dispersion pattern, integrated rigging hardware, and professional-grade connectors.

Feature	Description
Modular Design	Multiple units can be arrayed vertically for extended coverage
Weather Resistance	IP55 rated for outdoor use in various weather conditions
Frequency Response	Optimized for speech and music reinforcement
Power Handling	High power capacity for professional applications
Dispersion Pattern	Wide horizontal dispersion for consistent coverage
Rigging Hardware	Integrated points for safe and secure mounting
Input Connectors	Professional NL4 connectors for audio input
Finish	Durable black textured finish
Weight	Lightweight design for easier handling
Compatibility	Works with Bose PowerMatch amplifiers

Installation

Unpack and inspect contents. Ensure proper mounting hardware is available.

1. Determine array configuration: Calculate required number of units based on coverage area.
2. Prepare mounting structure: Ensure structure can support total weight of array.
3. Connect rigging hardware: Use approved rigging components and follow weight limits.
4. Secure electrical connections: Use appropriate gauge speaker cable for power requirements.
5. Test installation: Verify all connections before applying full power.

WARNING! Installation should be performed by qualified professionals. Ensure all rigging hardware is properly rated and secured.

First-Time Setup

Configure system for optimal performance based on application requirements.

1. Array configuration: Determine vertical splay angles between modules if applicable.
2. Amplifier setup: Configure Bose PowerMatch amplifier with appropriate presets.
3. System tuning: Use Bose ControlSpace software for system optimization.
4. Polarity check: Verify all speakers are in correct phase alignment.
5. Coverage verification: Test sound distribution throughout listening area.

CAUTION! Always power off amplifier before making or changing connections.

Specifications

• Type: Modular line array loudspeaker
• Frequency Response: 80Hz - 16kHz (±3dB)
• Power Handling: 300W continuous, 1200W peak
• Sensitivity: 95dB SPL (1W @ 1m)
• Maximum SPL: 128dB peak
• Dispersion: 120° horizontal, 15° vertical (per module)
• Impedance: 8 ohms nominal
• Connectors: Two NL4 connectors (parallel wired)
• Dimensions: 12.2" x 19.7" x 10.6" (310mm x 500mm x 270mm)
• Weight: 22 lbs (10 kg)
• Finish: Textured black paint
• Environmental Rating: IP55

Controls and Settings

No user controls on speaker enclosure. All settings controlled through amplifier and system processor.

Amplifier Controls: Gain, limiters, EQ settings, crossover points.

System Processor: Bose ControlSpace software provides comprehensive control including:

• System EQ and delay settings
• Zone configuration and level control
• Preset management
• System monitoring and diagnostics

Physical Adjustments: Rigging angles can be adjusted during installation for optimal coverage.

Connecting Devices

Connect to appropriate amplifier using professional speaker cable.

1. Turn off all equipment before making connections.
2. Use appropriate gauge speaker cable for the length and power requirements.
3. Connect to amplifier outputs using NL4 connectors.
4. For array configurations, use parallel wiring between modules as specified.
5. Secure all cable connections and strain relief.

Tip: Label all cables for easy identification during setup and troubleshooting.

System Configuration

Configure for various applications including installed sound, portable PA, and outdoor events.

1. Single module: Use for focused coverage in small to medium spaces.
2. Vertical array: Combine multiple modules for extended vertical coverage.
3. Horizontal array: Place modules side-by-side for wider horizontal coverage.
4. Delay system: Use additional arrays as delay fills for large venues.
5. Outdoor setup: Utilize weather-resistant features for outdoor applications.

WARNING! Do not exceed maximum array size recommendations. Follow all rigging safety guidelines.

Safety Features

Built-in protection: Thermal protection circuits prevent damage from overheating. Rigging safety: Integrated rigging points designed to industry safety standards. Weather protection: IP55 rating protects against dust and water ingress.

Care & Maintenance

Regular inspection and cleaning ensures optimal performance and longevity.

1. Exterior cleaning: Use mild soap and water with soft cloth. Do not use abrasive cleaners.
2. Connector inspection: Regularly check NL4 connectors for corrosion or damage.
3. Grille inspection: Check speaker grille for dents or damage that could affect performance.
4. Hardware inspection: Periodically check all rigging hardware for tightness and wear.
5. Storage: Store in dry environment when not in use.

CAUTION! Do not use high-pressure water sprays. Do not open enclosure - no user-serviceable parts inside.

Regulatory Information

Complies with relevant international standards for professional audio equipment. CE marked for European market. RoHS compliant. For technical support and warranty information, contact Bose Professional or visit www.bose.com/professional. Copyright © Bose Corporation. All rights reserved.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from speaker	Connection issues, amplifier problem	Check all cable connections, verify amplifier is powered on and functioning
Distorted sound	Overdriven amplifier, damaged speaker	Reduce amplifier gain, check for physical damage to speaker
Intermittent sound	Loose connections, cable damage	Inspect and secure all connections, check cables for damage
Reduced output	Impedance mismatch, amplifier settings	Verify impedance compatibility, check amplifier settings and limiters
Physical damage	Impact, weather exposure	Inspect for visible damage, contact authorized service center

Reset: Power cycle amplifier and check system processor settings.

Service: Contact Bose Professional support or authorized service center for repairs.