By Owen PalmerUpdated November 2026
The Bose Quiet Comfort 45 headphones are a noise cancelling over-ear model that most owners use for travel, work calls and everyday listening. In this guide you will learn how to get the most out of them: setting them up correctly, pairing them with your devices, adjusting noise cancelling and EQ, keeping the battery healthy, and fixing the problems owners run into most often. You do not need any special tools for most of this, just the headphones, your phone or laptop, and a few minutes.
What You Need Before You Start
Before setup, gather a few basics so the process goes smoothly. Most of the work below takes under 15 minutes.
Shopping for one? See our guide: Bose Quiet Comfort Headphones Buttons: 3 Best Replacement Parts for Repair.
- The headphones and the USB-C charging cable that came in the box
- A phone or computer with Bluetooth enabled
- The Bose Music app, free from the App Store or Google Play, for firmware updates and settings
- A quiet space for testing noise cancelling
- A soft, dry cloth for cleaning the ear cushions and headband
Step-by-Step Setup for Bose Quiet Comfort 45 Headphones
Step 1: Charge the Battery Fully
Connect the headphones to a USB-C power source using the included cable. Bose lists a charging time of roughly 2.5 hours for a full charge, and the battery is rated for up to about 24 hours of playback with noise cancelling on. Charge them fully before the first use. A full charge also gives you a more accurate sense of real battery life later.
Step 2: Turn On and Enter Pairing Mode
Press and hold the power button until you hear a voice prompt saying the headphones are ready to pair. If they connect to a previous device automatically, press and hold the Bluetooth button instead to force pairing mode. Once pairing mode is active, the headphones will appear in your device’s Bluetooth list as a Bose device.
Step 3: Pair with Your Phone or Computer
On your phone, open Bluetooth settings and select the headphones from the list of available devices. On a laptop, open the Bluetooth menu in your system settings and do the same. Once connected, you should hear a confirmation prompt. If you want to pair with a second device, keep the headphones in pairing mode and connect them to that device separately. The headphones can hold multiple paired devices and switch between them as you start audio on each one.
Step 4: Install the Bose Music App and Update Firmware
Open the Bose Music app and follow the prompts to add your headphones. The app will check for firmware updates. Install any update it offers, and keep the headphones charged during the process. Firmware updates often improve Bluetooth stability and noise cancelling performance, so this step is worth doing even if the headphones seem to work fine.
Step 5: Check the Fit
Over-ear headphones only block noise well when the ear cups form a seal around your ears. Place the cups over your ears and adjust the headband until the pressure feels even on both sides. If you hear a hissing or rushing sound when you move your head, the seal may be leaking, so reposition the cups slightly. Expect some initial clamping force, which usually eases over a few days of regular wear.
Tuning Noise Cancelling and Sound
Adjusting Noise Cancelling Levels
The Quiet Comfort 45 offers multiple noise cancelling settings, which you can control through the Bose Music app or the buttons on the ear cup, depending on your model configuration. Higher noise cancelling levels suit airplanes, buses and loud offices. Lower or off settings can make announcements easier to hear and may feel less pressurized for some listeners. Test each setting in the environment where you plan to use it most.
Using Aware Mode for Conversations
Aware mode lets outside sound pass through the microphones so you can hear your surroundings without removing the headphones. It is useful for crossing streets, talking to a coworker or listening for station announcements. Switch it on briefly when you need awareness, then return to full noise cancelling.
Equalizer Settings
| Listening Goal | Suggested Adjustment |
|---|---|
| Podcasts and speech | Slightly boost mids, reduce bass |
| Rock and electronic music | Modest bass boost, keep treble moderate |
| Classical and acoustic | Keep EQ flat for the most neutral sound |
| Long flights | Lower bass slightly to reduce fatigue |
Use these as starting points rather than fixed rules. Make small changes of 1 or 2 decibels at a time so you can hear what each adjustment does.
Managing Battery Life and Charging
Bose rates the Quiet Comfort 45 at about 24 hours of playback with noise cancelling on, and actual results vary with volume, Bluetooth codec and temperature. Owners often report shorter runtimes at high volume or in cold conditions. To keep the battery healthy over time, avoid leaving the headphones on a charger for long periods after they reach full charge, and store them at room temperature rather than in a hot car. If you travel often, carry the USB-C cable and a power bank for emergencies.
If runtime drops noticeably after a year or two of use, the battery may be wearing down. Check the Bose Music app for battery information, and contact Bose support if performance seems abnormal. Replacing the battery is a more involved job that many owners leave to authorized service centers.
Caring for the Ear Cushions and Headband
Ear cushions take the most wear. Skin oils, sweat and makeup break down the foam and the synthetic covering over time. Wipe the cushions weekly with a barely damp cloth and mild soap, then let them air dry fully before wearing the headphones again. Do not submerge the ear cups or spray cleaner directly onto them. If the cushions start to flatten, crack or peel, replacement is usually the best fix. Compatible pads are sold separately, and the right fit matters more than matching the color exactly.
Common Mistakes
- Ignoring firmware updates. Many Bluetooth and noise cancelling issues are resolved in updates, so check the app regularly.
- Forgetting to unpair old devices. Too many stored devices can cause the headphones to connect to the wrong one. Remove devices you no longer use.
- Cranking the volume to compensate for poor fit. A leaky seal reduces bass and makes you turn up the volume. Adjust the fit first.
- Storing them compressed in a bag. Constant pressure can deform the headband and strain the hinges over time.
- Using harsh cleaners. Alcohol-based sprays and abrasive wipes damage the cushion material and finish.
Tips for Better Everyday Use
- Set a noise cancelling level for each environment you use often, so you can switch quickly.
- Keep the carrying case handy and store the headphones in it when not in use.
- Test your microphone on a call before an important meeting by recording a short message.
- If you use both Apple and Android devices, check which codec each device supports, since this affects audio quality.
- Recharge when you hit around 20 percent rather than waiting for a full drain, which is generally kind to lithium batteries.
Troubleshooting Quick Reference
| Problem | Likely Cause | What to Try |
|---|---|---|
| Won’t pair | Still connected to another device | Turn off Bluetooth on the other device, then re-enter pairing mode |
| Audio cuts out | Distance or interference | Stay within the Bluetooth range and move away from microwaves and crowded Wi-Fi |
| Weak bass | Poor seal | Reposition the ear cups and check cushion condition |
| Short battery life | High volume, cold weather or aging battery | Lower volume, keep warm, and check battery health in the app |
| Hiss or rushing sound | Noise cancelling at maximum or a leak | Lower the noise cancelling level and adjust the fit |
Recommended gear
A few accessories make everyday use easier. Pick items that match how you travel and how you use the headphones.
- Replacement ear cushions help restore seal and comfort once the originals wear out. View on Amazon
- A hard carrying case protects the ear cups and headband in a bag. View on Amazon
- A USB-C cable gives you a spare for home, office or travel charging. View on Amazon
For more background on choosing and comparing models, see Bose Quiet Comfort Headphones vs Ultra: A Practical Guide (2026) and Bose Quiet Comfort Sc Headphones: Models, Fixes and Care Tips (2026). If you are weighing alternatives, Sony Versus Bose Noise Cancelling Headphones: Which Fits You Best (2026) compares the two brands directly. Owners who need new pads can also check Replacement Earpads for Bose Headphones: A Step-by-Step Guide (2026).
FAQ
How long does the battery last on Bose Quiet Comfort 45 headphones?
Bose rates them at about 24 hours of playback with noise cancelling on. Actual runtime depends on volume, temperature and battery age.
How do I put the Bose Quiet Comfort 45 headphones into pairing mode?
Press and hold the power button until you hear a voice prompt, or hold the Bluetooth button if the headphones are already on. Then select them from your device’s Bluetooth list.
Can I connect the headphones to two devices at once?
The headphones can store multiple paired devices, and they can switch between connected devices as audio starts on each one. Simultaneous streaming from two sources depends on your setup, so check the Bose Music app for current behavior.
Why do my ear cushions feel uncomfortable after a while?
Worn or flattened foam loses its shape and can press unevenly against your head. Replacement cushions often restore comfort and seal. Clamping force also eases with use over the first few days.
How do I clean the headphones safely?
Wipe the cushions and headband with a barely damp cloth and mild soap, then let them air dry completely. Avoid spraying liquids directly onto the ear cups or using alcohol-based cleaners.
What should I do if the noise cancelling feels weak?
Check that the ear cups form a tight seal, confirm the noise cancelling level is set high, and update the firmware through the Bose Music app. Persistent problems may need support from Bose.
Can I use the headphones while charging?
Owners often ask this. Check the current manual or Bose support information for whether playback during charging is supported on your unit, and avoid leaving the battery on the charger for long periods.
Should I contact Bose for battery or repair issues?
Yes. For battery degradation, damage or unusual behavior, contact Bose support or an authorized service center rather than opening the headphones yourself, since doing so can void coverage and create safety risks.
Conclusion
Setting up the Bose Quiet Comfort 45 headphones properly takes only a few minutes, and the payoff is better noise cancelling, steadier Bluetooth and more comfortable long sessions. Keep the firmware current, check the fit, and clean the cushions regularly. When something stops working, the troubleshooting table above is a good place to start before contacting support.
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About Owen Palmer
Owen Palmer is part of our editorial team and reviews and edits our brand headphones & noise cancelling guides, checking product details against manufacturer specifications and owner feedback.
