Bose Headphone QC3 Manual

The Bose QuietComfort 3 (QC3) Acoustic Noise Cancelling headphones provide premium audio quality with advanced noise reduction technology, comfortable around-ear design, and convenient controls for music and calls. Features include Active EQ for balanced sound, TriPort acoustic headphone structure, foldable design for portability, and a 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 Functions 6. Connecting to Devices 7. Using Noise Cancellation 8. Battery Information 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Headphones with noise-cancelling circuitry, Audio cable with inline remote and microphone, Airline adapter, Carrying case, AAA battery.

Feature	Description
Noise Cancellation	Active noise reduction for travel and quiet environments
Active EQ	Automatically adjusts sound for balanced audio at any volume
TriPort Structure	Acoustic design for rich, full sound without large earcups
Inline Remote	Controls volume, playback, and call management
Foldable Design	Easily folds for storage in included carrying case
Comfort Fit	Plush ear cushions and lightweight headband for extended wear
Airline Adapter	Dual-prong adapter for in-flight entertainment systems
Carrying Case	Protective case for travel and storage
Battery Powered	Single AAA battery for noise cancellation (up to 35 hours)
Audio Cable	Detachable cable with 3.5mm connectors

Package Contents

Unpack and verify all items are present.

Bose QuietComfort 3 headphones
Audio cable with inline remote and microphone
Airline adapter (dual-prong)
Protective carrying case
AAA alkaline battery
User manual and warranty information

WARNING! Keep small parts away from children to avoid choking hazard.

Getting Started

Prepare headphones for first use.

Insert battery: Open battery compartment on right earcup, insert AAA battery with correct polarity.
Connect audio cable: Plug cable into left earcup jack until it clicks.
Power on: Slide power switch to ON position; green indicator light will illuminate.
Connect to device: Plug other end of cable into audio source (phone, tablet, computer, etc.).

CAUTION! Do not force connectors; ensure proper alignment before inserting.

Specifications

Type: Over-ear, closed-back noise-cancelling headphones.
Driver: Proprietary TriPort acoustic design.
Frequency Response: 10Hz - 20kHz.
Impedance: 32 ohms.
Noise Cancellation: Active electronic noise reduction.
Battery: 1 AAA alkaline (up to 35 hours of use).
Connector: 3.5mm stereo jack (detachable cable).
Cable Length: 48 inches (122 cm).
Weight: 5.5 oz (156 g) without cable.
Warranty: Limited 1-year warranty.

Controls and Functions

Headphone controls: Power switch (ON/OFF) on right earcup. Inline remote: Volume up/down, Play/Pause, Answer/End call, Voice assistant activation.

Indicator Light: Green = powered on; Flashing green = low battery; Off = powered off.

Noise Cancellation: Active when power is ON; reduces ambient noise for improved listening. Audio Passthrough: When powered OFF, headphones function as passive headphones with reduced noise cancellation.

Connecting to Devices

Compatible with most devices with 3.5mm audio jack.

Ensure headphones are powered ON for noise cancellation.
Connect audio cable to headphone jack on left earcup.
Connect other end to device's headphone/audio output.
For airline use: Connect airline adapter to seat audio jack, then connect headphone cable.

Tip: For best audio quality, ensure device volume is set to moderate level before adjusting headphone volume.

Using Noise Cancellation

Noise cancellation works best with constant low-frequency sounds (airplane engines, office noise).

Power on: Slide switch to ON; you'll hear slight hiss indicating noise cancellation is active.
Put on headphones: Adjust headband and earcups for comfortable seal around ears.
Play audio: Start playback on connected device; noise cancellation enhances audio clarity.
Adjust volume: Use inline remote or device volume controls.
Power off: Slide switch to OFF when not in use to conserve battery.

WARNING! Do not use noise cancellation in situations where awareness of surroundings is critical (walking near traffic, etc.).

Battery Information

Battery life: Up to 35 hours with AAA alkaline battery. Low battery indicator: Flashing green light.

Replace battery: Open compartment on right earcup, remove old battery, insert new AAA battery with correct polarity.
Battery type: Use alkaline AAA for best performance; rechargeable NiMH AAA also compatible.
Storage: Remove battery if headphones will not be used for extended period.

CAUTION! Do not mix old and new batteries or different battery types.

Care & Maintenance

Clean headphones regularly for optimal performance and hygiene.

Ear cushions: Wipe with dry, soft cloth. If heavily soiled, use cloth slightly dampened with water.
Headband: Clean with dry cloth only.
Cable: Gently wipe with dry cloth; avoid pulling or bending sharply.
Storage: Fold headphones and store in carrying case when not in use.

CAUTION! Do not use solvents, cleaning fluids, or aerosols. Do not immerse in water.

Regulatory Information

FCC Compliance: This device complies with Part 15 of FCC Rules. Operation is subject to conditions: (1) device may not cause harmful interference, (2) device must accept any interference received. CE Mark: Complies with European directives. Copyright © Bose Corporation. All rights reserved. Bose, QuietComfort, TriPort, and Active EQ 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 / connections	Ensure power is ON; check cable connections at both ends; increase volume.
Noise cancellation not working	Battery / power	Replace battery; ensure power switch is ON; check battery polarity.
Intermittent sound	Loose connection	Check cable connections; try different audio source; inspect cable for damage.
Poor audio quality	Source / settings	Check audio source quality; ensure device volume is adequate; clean audio jack.
Battery drains quickly	Battery type / age	Use fresh alkaline battery; avoid leaving powered ON when not in use.
Uncomfortable fit	Adjustment needed	Adjust headband extension; reposition earcups; ensure proper seal around ears.

Reset: Power OFF, remove battery for 30 seconds, reinsert battery, power ON.

Service: Contact Bose Customer Support or visit authorized service center.