Bose MA 12 Manual

The Bose MA 12 is a modular array loudspeaker system designed for professional sound reinforcement applications. It features a modular design allowing for vertical array configurations, weather-resistant construction, wide horizontal dispersion, and integrated rigging hardware. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Modular array loudspeaker modules, Rigging hardware, Weather-resistant enclosure, Input connectors.

Feature	Description
Modular Design	Allows vertical stacking for array configurations
Weather-Resistant	Constructed for indoor/outdoor use
Wide Dispersion	120° horizontal coverage pattern
Integrated Rigging	Built-in points for safe suspension
Input Connectors	Neutrik NL4 compatible speakON connectors
Power Handling	High power capacity for professional use
Frequency Response	Optimized for speech and music reinforcement
Enclosure Material	Durable polypropylene construction
Mounting Options	Wall, pole, or array mounting
Color Options	Typically black or white finishes

Installation

Unpack and inspect contents. Ensure proper mounting surface.

1. Determine mounting location: Choose stable surface or structure.
2. Prepare rigging hardware: Use appropriate bolts and safety cables.
3. Mount speaker: Secure using integrated rigging points.
4. Connect audio cables: Use speakON connectors for secure connection.
5. Test installation: Verify secure mounting before operation.

WARNING! Speakers are heavy; use proper lifting techniques. Always use safety cables for suspended installations.

First-Time Setup

Configure speaker system for your application.

1. Determine array configuration: Decide on single or multiple module array.
2. Connect modules: Use rigging hardware to connect modules vertically.
3. Wire system: Connect speakON cables between modules and amplifier.
4. Set amplifier parameters: Configure appropriate power and crossover settings.
5. Test system: Play audio to verify proper operation.

CAUTION! Ensure all rigging hardware is properly rated for the speaker weight.

Specifications

• Type: Modular array loudspeaker
• Frequency Response: 80Hz - 16kHz (±3dB)
• Power Handling: 200W continuous, 800W peak
• Sensitivity: 93dB SPL (1W/1m)
• Impedance: 8 ohms nominal
• Dispersion: 120° H x 15° V (per module)
• Max SPL: 124dB peak
• Connectors: Neutrik NL4 speakON (2)
• Dimensions: Varies by configuration
• Weight: Approximately 15 lbs per module
• Finish: UV-resistant polyurethane

Controls and Connections

No active controls on speaker. All control via external amplifier.

Connections: Two Neutrik NL4 speakON connectors for input and link to additional speakers.

Rigging Points: Multiple integrated points for various mounting configurations.

Amplifier Requirements: Professional amplifier with appropriate power rating and protection circuitry.

Connecting to Audio Systems

Connect to amplifier using professional audio cables.

1. Turn off all equipment before connecting.
2. Use appropriate gauge speaker cable for the run length.
3. Connect amplifier output to speaker input using speakON connector.
4. For multiple speakers, use parallel wiring with proper impedance calculation.
5. Secure all connections and strain relief.

Tip: Always use balanced connections when possible to reduce noise.

Array Configuration

MA 12 modules can be arrayed vertically for different coverage patterns.

1. Single module: Basic installation for small areas.
2. Vertical array: Multiple modules stacked for increased vertical coverage.
3. Curved array: Modules angled for specific coverage patterns.
4. Calculate coverage: Use Bose modeling software for optimal configuration.
5. Secure array: Use all provided rigging hardware for safety.

WARNING! Do not exceed maximum array size recommendations. Always use safety cables.

Safety Features

Integrated rigging points with safety lock features. Weather-resistant design for outdoor use. Thermal protection via amplifier limiting.

Care & Maintenance

Clean with mild soap and water. Do not use harsh chemicals. Inspect rigging hardware regularly for wear.

CAUTION! Do not use pressure washers. Keep connectors clean and dry.

Regulatory Information

Complies with applicable safety standards. CE marked for European compliance. RoHS compliant. For technical support, contact Bose Professional or visit www.bose.com.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Connection issues	Check amplifier power, cable connections, speakON connector seating
Distorted sound	Overdriven amplifier	Reduce amplifier gain, check for clipping indicators
Intermittent sound	Loose connections	Check all cable connections, inspect cables for damage
Reduced output	Impedance mismatch	Check speaker wiring configuration, verify amplifier compatibility
Physical damage	Impact or weather	Inspect enclosure, contact Bose Professional for repair options

Reset: Check amplifier settings and reset if necessary.

Service: Contact Bose Professional support or authorized service center.