Bose QC3 Instructions Manual

The Bose QC3 is a premium over-ear noise-cancelling headphone featuring proprietary Bose Active Noise Cancellation technology, TriPort acoustic headphone structure, comfortable around-ear fit, foldable design for portability, rechargeable battery, audio input for use with in-flight entertainment systems, and carrying case. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Package Contents 3. Getting Started 4. Specifications 5. Controls and Indicators 6. Using the Headphones 7. Battery and Charging 8. Care & Maintenance 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Headphones with integrated electronics, Carrying Case, Airline Adapter, Audio Cable, Charger.

Feature	Description
Active Noise Cancellation	Electronically reduces ambient noise for improved listening
TriPort Acoustic Structure	Delivers balanced audio performance
Around-Ear Cushions	Provides comfort and passive noise isolation
Foldable Design	For easy storage and portability
Rechargeable Battery	Powers noise cancellation and audio
Audio Input Jack	For connection to audio sources and in-flight systems
Carrying Case	Protects headphones during travel
Power Switch	Turns noise cancellation on/off
Battery Indicator	LED shows charging status and battery level
Volume Control	Adjustable via connected device or inline remote (if applicable)

Package Contents

Unpack and verify all items are present.

Bose QC3 headphones
Carrying case
Audio cable (detachable)
Airline adapter (two-prong)
AC wall charger
Instruction manual

WARNING! Keep plastic bags away from children to avoid suffocation hazard.

Getting Started

Prepare headphones for first use.

Charge the battery: Connect charger to headphones and AC outlet. Charge for at least 3 hours before first use.
Connect audio: Plug audio cable into headphone jack and your audio source (e.g., smartphone, MP3 player).
Power on: Slide power switch to ON position. You will hear a tone indicating noise cancellation is active.
Adjust fit: Extend headband and position ear cups comfortably around ears.

CAUTION! Use only the provided Bose charger. Do not use while charging if not recommended.

Specifications

Type: Over-ear, closed-back noise-cancelling headphones.
Driver: Proprietary Bose TriPort.
Frequency Response: Not specified by Bose (optimized for balanced sound).
Noise Cancellation: Bose Active Noise Cancellation technology.
Battery: Rechargeable lithium-ion (user-replaceable).
Battery Life: Up to 20 hours (noise cancellation on).
Charging Time: Approximately 3 hours for full charge.
Connections: 3.5mm audio input, airline two-prong adapter.
Weight: Approximately 5.9 oz (167 g).
Operating Temp: 32°F to 104°F (0°C to 40°C).

Controls and Indicators

Primary controls located on left ear cup.

Power Switch: Slides to ON/OFF. ON enables noise cancellation.

Battery Indicator LED: - Solid green: Battery fully charged. - Flashing green: Battery charging. - Solid amber: Battery moderately charged. - Flashing amber: Battery low. - Flashing red: Battery very low, charge immediately. - Off: Battery depleted or not charging.

Audio Input Jack: Connect included audio cable.

Charging Port: Connect provided AC charger.

Using the Headphones

For music, movies, travel, and calls (if compatible).

Ensure battery is charged and power is ON for noise cancellation.
Connect audio cable to headphones and your device.
Adjust volume on your audio source.
For airline use: Connect airline adapter to seat jack, then connect audio cable to adapter.
To conserve battery: Turn power OFF when not using noise cancellation.
Fold headphones: Rotate ear cups inward and fold into carrying case.

Tip: Noise cancellation works best with consistent low-frequency sounds (e.g., airplane cabin noise).

Battery and Charging

Rechargeable battery provides power for noise cancellation.

Charging: Connect charger to headphones and AC outlet. LED flashes green during charge, solid green when complete.
Battery life: Up to 20 hours with noise cancellation on. Less if using audio at high volumes.
Low battery: LED flashes amber/red. Charge as soon as possible.
Battery replacement: Contact Bose customer service for replacement battery kit.
Storage: If not using for extended period, charge to 50% and store in cool, dry place.

WARNING! Do not disassemble battery. Use only specified charger. Dispose of battery according to local regulations.

Care & Maintenance

Unplug before cleaning. Use dry, soft cloth only; no liquids or solvents.

Ear Cushions: Gently wipe with damp cloth if needed. Allow to dry completely before use.

Headband: Wipe with dry cloth.

Storage: Store in carrying case when not in use to protect from dust and damage.

CAUTION! Do not expose to extreme heat, moisture, or direct sunlight. Do not use abrasive cleaners.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. Copyright © Bose Corporation. All rights reserved. Bose and the Bose logo are trademarks of Bose Corporation. For support, visit www.bose.com or contact Bose Customer Service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No sound	Power off/cable	Turn power ON; check audio cable connections; ensure audio source is on and volume up.
Noise cancellation not working	Battery/switch	Charge battery; ensure power switch is ON; listen for startup tone.
Poor audio quality	Source/cable	Check audio source quality; try different audio cable; ensure plug is fully inserted.
Battery not charging	Charger/outlet	Check charger connection; try different AC outlet; ensure charging port is clean.
Discomfort	Fit	Adjust headband extension; reposition ear cups; take breaks during extended use.

Reset: Turn power OFF, disconnect all cables, wait 30 seconds, then reconnect and power ON.

Service: For warranty and repair, contact Bose Customer Service or visit www.bose.com.