Bose 802 III Manual

The Bose 802 III is a professional loudspeaker system designed for high-quality sound reinforcement in various applications. It features eight full-range drivers, a tuned port enclosure, and requires an external equalizer (typically the Bose 802C or 802E) for optimal performance. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: Eight 4.5-inch full-range drivers, tuned port enclosure, NL4 Speakon connectors, integrated mounting points, and compatibility with Bose 802C/802E equalizers.

Feature	Description
Driver Array	Eight 4.5-inch full-range drivers for wide dispersion
Enclosure Design	Tuned port for extended low-frequency response
Connectors	Dual NL4 Speakon connectors for parallel wiring
Mounting Options	Integrated points for pole mounting or suspension
Equalizer Requirement	Requires external Bose 802C or 802E equalizer
Power Handling	Continuous: 240W, Program: 480W, Peak: 960W
Frequency Response	55Hz - 16kHz (with equalizer)
Sensitivity	96 dB SPL (1W @ 1m)
Impedance	8 ohms nominal
Coverage Pattern	120° H x 100° V

Installation

Unpack and inspect contents. Ensure proper mounting location and structural support.

1. Positioning: Place on stable surface or mount securely using appropriate hardware.
2. Pole Mounting: Use compatible 35mm pole; insert into socket on bottom of enclosure.
3. Suspension: Use certified rigging points with appropriate hardware and safety cables.
4. Connections: Use Speakon cables to connect to amplifier outputs.
5. Equalizer Connection: Connect equalizer between mixer and amplifier.

WARNING! Speaker is heavy; use proper lifting techniques and secure mounting to prevent injury or damage.

First-Time Setup

Connect components in correct order for optimal performance.

1. Connect equalizer: Insert Bose 802C/802E equalizer between mixer and amplifier.
2. Connect amplifier: Use appropriate gauge speaker cable with Speakon connectors.
3. Set amplifier gain: Start with low volume; gradually increase to avoid damage.
4. Verify equalizer settings: Ensure correct curve is applied (typically flat position).
5. Test system: Play audio at low volume to check all connections.

CAUTION! Always power off amplifier when making connections to prevent damage.

Specifications

• Model: Bose 802 III Professional Loudspeaker
• Drivers: Eight 4.5-inch full-range
• Power Handling: 240W continuous, 480W program, 960W peak
• Impedance: 8 ohms nominal
• Sensitivity: 96 dB SPL (1W @ 1m)
• Frequency Response: 55Hz - 16kHz (with equalizer)
• Coverage: 120° horizontal x 100° vertical
• Connectors: Dual NL4 Speakon
• Dimensions: 15.75" H x 23.5" W x 11.75" D (400mm x 597mm x 298mm)
• Weight: 35 lbs (15.9 kg)
• Finish: Black textured paint

Controls and Connections

No internal controls; all adjustments made through external equalizer and amplifier.

Connections: Dual NL4 Speakon connectors (parallel wired).

Equalizer Controls (802C/802E): Low-frequency contour, midrange presence, high-frequency presence, overall level.

Amplifier Requirements: High-quality amplifier capable of delivering 240-480W at 8 ohms.

Mounting Points: Bottom pole socket, top threaded inserts for suspension.

Connecting to Audio Systems

Proper signal chain: Mixer → Equalizer → Amplifier → Speakers.

1. Turn off all equipment before making connections.
2. Connect mixer outputs to equalizer inputs using balanced XLR or 1/4" cables.
3. Connect equalizer outputs to amplifier inputs.
4. Connect amplifier outputs to speaker Speakon connectors using appropriate speaker cable.
5. Ensure proper polarity (+/-) is maintained throughout signal chain.

Tip: Use high-quality cables and connectors to maintain signal integrity.

Equalizer Setup

The Bose 802C/802E equalizer is essential for proper frequency response.

1. Initial settings: Set all controls to flat (12 o'clock position).
2. Low-frequency contour: Adjust based on room acoustics and placement.
3. Midrange presence: Adjust for vocal clarity.
4. High-frequency presence: Adjust for brightness without harshness.
5. Level control: Set appropriate output level to match system.
6. System tuning: Use pink noise and measurement microphone for optimal results.

WARNING! Do not bypass equalizer as it provides necessary correction for proper speaker performance.

Applications

Suitable for various professional sound reinforcement applications:

• Background music systems
• Speech reinforcement
• Live music venues
• House of worship
• Conference rooms
• Retail environments
• Portable PA systems

Can be used singly, in pairs, or as part of larger arrays.

Care & Maintenance

Regular inspection and cleaning ensures optimal performance and longevity.

1. Cleaning: Use soft, dry cloth only; avoid solvents or abrasive cleaners.
2. Grille: Vacuum gently to remove dust from driver openings.
3. Connectors: Inspect regularly for corrosion or damage.
4. Mounting hardware: Check security before each use.
5. Storage: Keep in dry, temperature-controlled environment.

CAUTION! Do not attempt to open enclosure or service drivers; contact authorized service center.

Regulatory Information

Complies with applicable safety and EMC regulations. Manufactured by Bose Corporation. For technical support and service, contact authorized Bose professional dealers or visit www.bose.com. This product is covered by Bose limited warranty; refer to warranty card for details.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Power/connections	Check amplifier power; verify all connections; ensure equalizer is in signal path.
Distorted sound	Overdriven amplifier	Reduce amplifier gain; check for clipping indicators.
Weak bass response	Equalizer settings	Adjust low-frequency contour on equalizer; check speaker placement.
Intermittent sound	Loose connections	Check all cable connections; inspect Speakon connectors.
Uneven coverage	Placement issues	Reposition speakers; ensure proper aiming for coverage area.
Hum or buzz	Ground loop	Use balanced connections; ensure proper grounding of all equipment.

Service: Contact authorized Bose professional dealer or service center.

Support: www.bose.com or technical support hotline.