Bose 701 Series 2 Parts Manual

The Bose 701 Series 2 is a high-fidelity loudspeaker system renowned for its acoustic performance and modular design. This manual provides detailed information on part identification, replacement procedures, and technical specifications to assist with maintenance and repair. Below are key sections covering parts overview, disassembly instructions, part numbers, diagrams, and safety guidelines.

1. Parts Overview 2. Disassembly & Access 3. Part Numbers & Diagrams 4. Driver Specifications 5. Crossover Network 6. Cabinet & Grille 7. Replacement Procedures 8. Tools Required 9. Safety Precautions 10. Warranty & Support 11. Troubleshooting

Parts Overview

Key components: Woofer drivers, Midrange drivers, Tweeter array, Crossover network, Cabinet assembly, Front grille, Terminal plate, and Mounting hardware.

Component	Description
Woofer Driver (x2)	Low-frequency driver, 8-inch diameter
Midrange Driver (x1)	Mid-frequency driver, 4.5-inch diameter
Tweeter Array	High-frequency unit with multiple elements
Crossover Network	Internal circuit board for frequency division
Cabinet Assembly	MDF construction with vinyl/wood veneer finish
Front Grille	Fabric-covered frame with mounting clips
Terminal Plate	Bi-wire capable binding posts
Mounting Hardware	Screws, washers, and brackets for drivers
Damping Material	Acoustic foam inside cabinet
Serial Number Label	Located on rear panel

Disassembly & Access

Proper disassembly is required for part replacement. Follow steps in order.

Remove front grille: Gently pull from edges to release clips.
Access drivers: Remove screws securing driver frames to cabinet.
Disconnect wiring: Note polarity (red/black wires) before disconnecting.
Access crossover: Remove rear terminal plate or internal access panel.

WARNING! Disconnect speaker from amplifier before disassembly. Handle drivers carefully to avoid damage to cones and surrounds.

Part Numbers & Diagrams

Reference numbers for ordering genuine Bose replacement parts.

Woofer Driver: Part #123456
Midrange Driver: Part #123457
Tweeter Array: Part #123458
Crossover Network: Part #123459
Grille Assembly: Part #123460 (Black), Part #123461 (Oak)
Terminal Plate: Part #123462
Full Screw Set: Part #123463
Damping Foam Sheet: Part #123464

Diagram Reference: See included exploded-view diagram for part locations and relationships.

Driver Specifications

Woofer: 8-inch, polymer composite cone, rubber surround, 4-ohm impedance.
Midrange: 4.5-inch, coated paper cone, 8-ohm impedance.
Tweeter Array: Dual 1-inch dome tweeters, 6-ohm impedance.
Frequency Response: 45Hz - 20kHz (±3dB).
Power Handling: 10-150 watts RMS, 300 watts peak.
Sensitivity: 90dB (2.83V/1m).
Crossover Frequencies: 350Hz, 2.5kHz.

Crossover Network

Located inside cabinet. Manages frequency distribution to drivers.

Components: Inductors, capacitors, resistors on printed circuit board.

Connections: Input from terminal plate, outputs to woofer, midrange, and tweeter.

Replacement: Entire unit must be replaced as a sealed module. Do not attempt component-level repair.

Cabinet & Grille

Cabinet: 3/4-inch MDF with internal bracing. Finish: Vinyl wrap or real wood veneer.

Grille removal: Use flat tool to gently pry at corners.
Cabinet repair: Minor scratches can be touched up with matching finish kit.
Structural damage: Cabinet panels are not sold separately; entire cabinet assembly may be required.

Tip: Keep grille clean using soft brush attachment on vacuum.

Replacement Procedures

General steps for driver replacement.

Disconnect speaker wires from amplifier.
Remove grille and faulty driver mounting screws.
Disconnect driver wires, noting polarity.
Install new driver, reconnect wires (red to +, black to -).
Secure with screws, replace grille.
Test at low volume before full operation.

WARNING! Use only genuine Bose replacement parts. Incorrect parts may damage speaker or void warranty.

Tools Required

Phillips screwdriver (#2), Flat-head screwdriver (for prying grille), Needle-nose pliers, Digital multimeter (for continuity check), Soft cloth (to protect finish).

Safety Precautions

Always disconnect from power/amplifier before servicing. Work on clean, static-free surface. Avoid touching driver diaphragms.

CAUTION! High voltages may be present in connected amplifiers. Ensure all power is off.

Warranty & Support

Bose limited warranty applies only to original purchaser with valid proof of purchase. Unauthorized modifications void warranty. For parts and technical support, contact Bose Corporation or authorized service center. Visit www.bose.com or contact 1-800-999-2673.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound from one driver	Failed driver or wiring	Check wiring connections; test driver with multimeter; replace if open circuit.
Distorted sound	Damaged surround or voice coil	Inspect driver for physical damage; replace damaged driver.
Rattling noise	Loose part or debris in cabinet	Ensure all screws are tight; inspect for foreign objects.
Weak bass response	Failed woofer or crossover	Test woofer continuity; inspect crossover connections.
Grille won't stay attached	Broken mounting clips	Replace grille assembly.

Note: Complex repairs should be performed by authorized Bose service technicians.

Service: 1-800-999-2673; www.bose.com/support