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Steps for removing and replacing speaker grilles, including screws and clips.
Steps for removing and replacing speaker drivers, including screws and wire connections.
Procedures for accessing, removing, and replacing the shading network PCB and its wiring.
Method to remove the Speakon connector by releasing the tinnerman clip.
Detailed steps for aligning and securing the Speakon connector with tinnerman clips.
Procedures to check driver phase and crossover network functionality.
Methods for detecting abnormal driver noises and air leaks.
Procedure to test speaker performance across a frequency range.
The Bose 802 Series III Loudspeaker is a professional audio device designed to deliver high-quality sound in various environments. This loudspeaker is engineered for robust performance and clarity, making it suitable for a wide range of applications, from live sound reinforcement to installed sound systems. Its design emphasizes durability and consistent audio output, ensuring reliable operation over extended periods.
The Bose 802 Series III Loudspeaker functions as a full-range passive loudspeaker, meaning it requires an external amplifier and a separate controller (such as a Bose Panaray system digital controller) for optimal performance. It is equipped with eight 4.5-inch environmental drivers, which are specially designed to withstand various environmental conditions, making the speaker suitable for both indoor and outdoor use. These drivers are configured to provide a wide and even sound dispersion, minimizing "hot spots" and ensuring consistent coverage across the listening area.
The loudspeaker incorporates a proprietary Shading Network PCB, which is crucial for its acoustic performance. This network manages the frequency response and power distribution to the individual drivers, contributing to the speaker's balanced sound and protection against overload. The design includes two round ports, centrally located within each four-speaker pattern, which enhance the low-frequency response and overall efficiency of the system.
The 802 Series III is designed for high power handling, capable of continuous operation at significant wattage levels, making it suitable for demanding professional audio applications. Its sensitivity rating indicates that it can produce considerable sound pressure levels with relatively low input power, contributing to its efficiency. The nominal impedance of the speaker is designed to be compatible with a wide range of professional amplifiers.
The Bose 802 Series III Loudspeaker is designed for versatile deployment. Its compact and durable enclosure allows for various mounting options, including pole mounting, wall mounting, and suspension, adapting to different installation requirements. The speaker's aesthetic, available in multiple grille colors, allows it to blend seamlessly into diverse architectural settings.
Connectivity is provided through a Speakon connector, a standard in professional audio for secure and reliable connections. The use of Speakon connectors ensures a robust interface with amplifiers, preventing accidental disconnections and maintaining signal integrity, even in dynamic environments. The speaker's design also considers ease of integration into larger sound systems, with clear labeling of input terminals to facilitate correct wiring.
The loudspeaker's wide dispersion pattern is a key usage feature, allowing for fewer speakers to cover a given area while maintaining consistent sound quality. This reduces installation complexity and cost, making it an efficient choice for large venues, auditoriums, and outdoor spaces. The environmental drivers contribute to its resilience, enabling deployment in challenging conditions where temperature fluctuations, humidity, or other environmental factors might affect conventional speakers.
The Bose 802 Series III Loudspeaker is designed with maintainability in mind, allowing for component replacement and troubleshooting to extend its lifespan. The manual provides detailed disassembly and assembly procedures for key components, ensuring that authorized service personnel can perform repairs efficiently.
Grille Removal and Replacement: The grille, which protects the drivers, can be easily removed by unscrewing the trim ring and then the grille itself. This access is essential for inspecting the drivers or performing internal maintenance. Replacement involves aligning the grille and trim ring and securing them with screws, ensuring the clips are properly seated.
Driver Removal and Replacement: Individual drivers can be removed by first taking off the grille and then unscrewing the driver from the cabinet. The manual specifies cutting the wires as close as possible to the driver's wire terminal for removal and then reattaching new wires to the replacement driver, following the provided wiring diagrams. This modular approach allows for the replacement of a single faulty driver without needing to replace the entire speaker.
Shading Network PCB Removal/Access and Replacement: The Shading Network PCB, a critical internal component, can be accessed by removing specific drivers (positions 2, 3, 6, and 7) and then unscrewing the PCB from the cabinet wall. This procedure enables inspection, repair, or replacement of the network. The manual includes a layout diagram for the PCB, aiding in component identification and troubleshooting. Replacement involves securing the PCB with screws and reattaching any removed wires according to the wiring diagram.
Speakon Connector Removal and Replacement: The Speakon connector, which handles the audio input, can be removed by prying out a tinnerman clip located inside the cabinet, after removing specific drivers to gain access. This allows for the replacement of a damaged connector. The manual provides instructions for reshaping or replacing the tinnerman clip and securely fastening the new Speakon connector, emphasizing the importance of a secure fit for reliable operation.
Test Procedures: The manual outlines several test procedures to diagnose issues and verify proper functionality after maintenance.
These detailed maintenance procedures and test guidelines ensure that the Bose 802 Series III Loudspeaker can be effectively serviced, prolonging its operational life and maintaining its high-quality audio performance. The availability of part lists for main components, shading network, and packaging further supports efficient repair and replacement processes.
General| Impedance | 8 ohms |
|---|---|
| Grille | Powder-coated steel |
| Frequency Response | 55 Hz - 16 kHz |
| Power Handling | 240 W continuous |
| Peak Acoustic Output | 116 dB SPL, 1m |
| Drivers | Eight 4.5" full-range drivers |
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