JBL JBLT670NCBLUAM
JBL Tune 670NC Wireless On-Ear Headphones User Manual
Model: JBLT670NCBLUAM
Introduction
The JBL Tune 670NC headphones are designed to provide an immersive audio experience with adaptive noise cancelling, smart ambient features, and the signature JBL Pure Bass Sound. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your headphones.

Image: A pair of blue JBL Tune 670NC wireless on-ear headphones, showcasing their sleek design.
What's in the Box
- 1 x JBL Tune 670NC headphones
- 1 x USB-C Charging Cable
- 1 x Detachable audio cable
- 1 x Warranty/Warning document
- 1 x Quick Start Guide (QSG)
Setup
Charging the Headphones
Before first use, fully charge your JBL Tune 670NC headphones. Connect the supplied USB-C charging cable to the charging port on the headphones and to a power source. A full charge takes approximately 2 hours. A quick 5-minute charge provides an additional 3 hours of music playback.
Power On/Off
- To power on: Press and hold the power button located on the ear-cup until the LED indicator lights up.
- To power off: Press and hold the power button until the LED indicator turns off.
Bluetooth Pairing
The JBL Tune 670NC headphones utilize Bluetooth 5.3 for stable wireless connectivity.
- Ensure the headphones are powered off.
- Press and hold the power button for approximately 5 seconds until the LED indicator flashes blue, indicating pairing mode.
- On your device (smartphone, tablet, laptop), enable Bluetooth and search for available devices.
- Select "JBL Tune 670NC" from the list of discovered devices.
- Once connected, the LED indicator will turn solid blue.
Multi-Point Connection: These headphones support simultaneous connection to two Bluetooth devices. To switch between devices, simply pause audio on the first device and start playing on the second. For calls, the headphones will automatically switch to the device receiving the call.

Image: A close-up view of the JBL Tune 670NC headphones, highlighting the control buttons on the ear-cup.
Operating the Headphones
Adaptive Noise Cancelling (ANC) and Smart Ambient
The JBL Tune 670NC features Adaptive Noise Cancelling to minimize distractions. You can also activate Smart Ambient modes:
- Ambient Aware: Allows you to hear your surroundings without removing the headphones.
- TalkThru: Lowers music volume and amplifies voices, enabling conversations while wearing headphones.
These modes can be easily activated and managed through the JBL Headphones app.

Image: A person wearing black JBL Tune 670NC headphones, illustrating the use of Adaptive Noise Cancelling and Smart Ambient features in an urban environment.
JBL Pure Bass Sound
Experience the renowned JBL Pure Bass Sound, delivering powerful and clear audio performance.

Image: A person wearing white JBL Tune 670NC headphones, emphasizing the JBL Pure Bass Sound experience.
JBL Headphones App
Download the free JBL Headphones App to customize your listening experience. The app allows you to:
- Tailor the sound with preset EQ modes or by adjusting the EQ curve.
- Activate Ambient Sound Control modes (Ambient Aware, TalkThru).
- Optimize Bluetooth performance with Smart Audio & Video features (select Audio for best sound quality or Video for optimal gaming/video output).
- Receive voice prompts in your preferred language.
Hands-free Calls with VoiceAware
Manage your calls directly from the convenient buttons on the ear-cup. VoiceAware allows you to hear your own voice while speaking, enhancing call clarity and comfort.
Comfort and Design
The JBL Tune 670NC headphones are designed to be lightweight, comfortable, and foldable for easy portability and storage.

Image: Blue JBL Tune 670NC headphones shown in their folded position, demonstrating their portability.
Maintenance
To ensure the longevity and optimal performance of your JBL Tune 670NC headphones, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the ear-cups and headband. Avoid using harsh chemicals or abrasive materials.
- Storage: When not in use, store the headphones in a cool, dry place, away from direct sunlight and extreme temperatures. Utilize their foldable design for compact storage.
- Battery Care: Avoid fully discharging the battery frequently. For long-term storage, charge the headphones to about 50% to preserve battery health.
- Liquid Exposure: Do not expose the headphones to water or excessive moisture.
Troubleshooting
If you encounter issues with your JBL Tune 670NC headphones, refer to the following common troubleshooting steps:
| Problem | Possible Solution |
|---|---|
| Headphones do not power on | Ensure the battery is charged. Connect to a power source using the USB-C cable. |
| Cannot pair via Bluetooth | Ensure headphones are in pairing mode (flashing blue LED). Turn off and on Bluetooth on your device. Forget the device in your Bluetooth settings and try pairing again. Ensure no other devices are connected. |
| No sound or low volume | Check headphone and device volume levels. Ensure headphones are properly connected. Try playing audio from a different source. |
| Noise Cancelling not effective | Ensure ANC is activated. Adjust headphone fit on your ears. Some high-frequency sounds may not be fully cancelled. |
| Call quality issues | Ensure microphone is not obstructed. Check network signal on your phone. Use VoiceAware feature to monitor your own voice. |
| Headphones app not connecting | Ensure headphones are powered on and connected via Bluetooth to your device. Restart the app. |
For more detailed troubleshooting or persistent issues, refer to the official JBL support website or contact customer service.
Specifications
Key technical specifications for the JBL Tune 670NC headphones:
| Feature | Detail |
|---|---|
| Model Name | JBL Tune 670NC |
| Model Number | JBLT670NCBLUAM |
| Noise Control | Adaptive Noise Cancellation |
| Frequency Response | 20 Hz – 20 kHz |
| Connectivity Technology | Wireless (Bluetooth 5.3 with LE Audio*) |
| Battery Life | Up to 70 Hours |
| Charging Time | 2 Hours (5 min for 3 hours speed charge) |
| Item Weight | 174 Grams (6.1 ounces) |
| Product Dimensions | 6.69 x 2.87 x 7.87 inches |
| Control Method | Button, Voice (Google Assistant, Siri) |
| Ear Placement | On-Ear |
| Material | Plastic |
| Included Components | Headphones, USB-C Charging Cable, Detachable audio cable, Warranty/Warning, QSG |
*LE Audio available via OTA update at a later stage.

Image: A diagram illustrating the dimensions of the JBL Tune 670NC headphones in centimeters.
Warranty and Support
Your JBL Tune 670NC headphones come with a manufacturer's warranty. Please refer to the included Warranty/Warning document for specific terms and conditions, including warranty period and coverage details.
For product support, technical assistance, or to inquire about warranty claims, please visit the official JBL support website or contact JBL customer service. Contact information can typically be found on the JBL website or in the product packaging.
Online Resources:
- JBL Official Website: www.jbl.com
- JBL Support Page: (Check JBL website for specific support page link)