The Bose 802 Series II is a professional loudspeaker system designed for high-quality sound reinforcement in various applications. This service manual provides detailed information for qualified service personnel, covering system overview, specifications, installation guidelines, wiring diagrams, component replacement procedures, troubleshooting, and maintenance. The speaker features eight 4.5-inch full-range drivers, a tuned port enclosure, and is designed for use with the Bose 802C or 802II Controller for proper equalization.
The Bose 802 Series II loudspeaker is a direct/reflecting design utilizing an array of eight full-range drivers for wide dispersion and high output. It requires an external active controller (802C or 802II) for proper frequency response and system protection.
| Feature | Description |
|---|---|
| Driver Array | Eight 4.5-inch full-range drivers |
| Enclosure Type | Bass-reflex (ported) design |
| Dispersion | 120° H x 100° V nominal |
| Recommended Amplifier Power | Up to 240 watts continuous (per channel into 8 ohms) |
| Controller Requirement | Bose 802C or 802II Active Equalizer required |
| Input Connectors | Two 1/4-inch phone jacks (parallel wired) |
| Grille | Removable black steel grille with foam backing |
| Mounting Options | Integral flyware points for suspension, pole mount socket |
| Finish | Textured black vinyl over wood cabinet |
| Application | Professional sound reinforcement, background music, portable PA |
Proper installation is critical for performance and safety. The cabinet includes integrated flyware for suspension by qualified personnel only.
WARNING! Suspended loads are dangerous. Installation must be performed by professionals following all local safety codes.
The speaker uses a simple parallel-wired input. The internal network connects the eight drivers in a series/parallel configuration to present an 8-ohm load.
Tip: Label all cables at both ends for easy identification during troubleshooting.
Internal components are mounted on a removable rear access panel.
Internal Layout: Eight drivers mounted on front baffle. Crossover network and input jacks mounted on rear panel. Port tube located between driver arrays.
Wiring Diagram: Drivers are arranged in two vertical columns of four. Each column is a series string of four drivers (16 ohms total). The two columns are then wired in parallel, resulting in an 8-ohm nominal load. The crossover is a first-order network.
Exploded View Reference: See Fig. 1 in manual appendix for detailed part identification and assembly order.
Replacement drivers must be genuine Bose part number 080-xxxxx. Follow ESD precautions.
WARNING! Do not overtighten driver screws. Do not puncture driver cone during handling.
The passive network is potted and non-serviceable. If failure is suspected, the entire network assembly must be replaced.
CAUTION! The network contains inductors and capacitors that can hold a charge. Allow time to discharge after use.
Inspect cabinet regularly for physical damage, loose hardware, or water exposure.
Cleaning: Wipe exterior with a dry, soft cloth. For stubborn marks, use a cloth dampened with mild soapy water. Do not use solvents or abrasive cleaners.
Grille Care: Vacuum foam backing gently to remove dust. Do not remove foam.
Hardware Check: Periodically check and tighten all mounting points, input jacks, and flyware bolts.
Port Inspection: Ensure the rear port is clear of obstructions.
CAUTION! Do not expose the cabinet to direct moisture or extreme temperatures. Store in a dry environment.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No Sound | Open cable, faulty connection, amplifier off | Check all connections and amplifier power. Test cable continuity. Bypass controller. |
| Distorted Sound | Overdriven amplifier, blown driver | Reduce amplifier gain. Test each driver individually for rubbing/buzzing. |
| Intermittent Sound | Loose wire, faulty jack | Inspect internal solder joints on input jacks and driver connections. |
| Weak Output | Polarity reversal, partial driver failure | Check system polarity. Test each driver for output. |
| Excessive Bass / Port Noise | Missing controller, incorrect setup | Ensure Bose 802C/802II controller is connected and powered. Verify controller settings. |
System Test: Use a 1.5V battery to gently tap across speaker terminals. A healthy driver will produce a "pop" and cone movement.
Genuine Bose replacement parts are required for proper performance and safety.
Ordering: Contact an authorized Bose Professional dealer or Bose Parts Department. Provide serial number from rear label.
This product is designed to comply with applicable safety and EMC standards.
Electrical Safety: Installation and service should be performed by qualified personnel. Disconnect all power before servicing.
Mechanical Safety: Ensure all suspension and mounting hardware is certified and inspected regularly. The speaker is heavy; lift with proper technique or mechanical aid.
EMC Compliance: This device complies with Part 15 of the FCC Rules. Operation is subject to the condition that it does not cause harmful interference.
Disposal: Dispose of electronic components and batteries according to local regulations.
Support: For technical assistance, contact Bose Professional Support or visit www.bose.com/pro.