1. Introduction
This manual provides detailed instructions for the Marshall Major IV On-Ear Bluetooth Headphones. Please read this guide thoroughly before using your headphones to ensure proper operation and to maximize your listening experience. The Major IV headphones offer over 80 hours of wireless playtime, wireless charging capability, and an ergonomic design for extended comfort.
2. What's in the Box
Verify that all items are present in the packaging:
- Marshall Major IV On-Ear Bluetooth Headphones
- USB-C Charging Cable
- 3.5mm Audio Cable
- User Manual (this document)
3. Product Overview
Familiarize yourself with the various components of your Marshall Major IV headphones.

Figure 3.1: Marshall Major IV On-Ear Bluetooth Headphones, showing the right earcup with the multi-directional control knob and the headband.

Figure 3.2: Close-up view of the multi-directional control knob on the right earcup, used for various functions.

Figure 3.3: The Marshall Major IV headphones folded into a compact form for easy storage and portability.
Key Components:
- Earcups: Soft, ergonomic ear cushions designed for comfort during extended listening.
- Headband: Adjustable headband for a secure and comfortable fit.
- Multi-directional Control Knob: A single knob located on the right earcup for controlling power, music playback, and phone calls.
- USB-C Port: Located on the bottom of an earcup for charging the headphones.
- 3.5mm Audio Jack: Located on the bottom of an earcup for wired connection and audio sharing.
4. Setup
4.1 Charging the Headphones
Before initial use, fully charge your Major IV headphones. The headphones offer two charging methods:
- USB-C Charging: Connect the supplied USB-C cable to the USB-C port on the headphone and to a USB power source.
- Wireless Charging: Place the right earcup flat on a compatible wireless charging pad (not included). Ensure the earcup is centered on the charging pad for optimal charging.
A full charge provides over 80 hours of wireless playtime. A quick 15-minute charge can provide approximately 15 hours of listening time.

Figure 4.1: The Marshall Major IV headphones being charged wirelessly on a compatible charging pad.
4.2 Power On/Off
- To Power On: Press and hold the multi-directional control knob for approximately 2 seconds until the LED indicator lights up and an audible power-on sound is heard.
- To Power Off: Press and hold the multi-directional control knob for approximately 2 seconds until the LED indicator turns off and an audible power-off sound is heard.
4.3 Bluetooth Pairing
To connect your headphones to a Bluetooth-enabled device:
- Ensure the headphones are powered off.
- Press and hold the multi-directional control knob for 4-5 seconds until the LED indicator flashes blue. This indicates pairing mode.
- On your device (smartphone, tablet, computer), navigate to the Bluetooth settings.
- Select "Major IV" from the list of available devices.
- Once connected, the LED indicator will turn solid white.
Note: If you experience Bluetooth connectivity issues, turn off the Bluetooth function on your device for a few minutes, then turn it back on and attempt to pair again.
5. Operating Instructions
5.1 Multi-directional Control Knob Functions
The multi-directional control knob provides comprehensive control over your audio and calls:
- Play/Pause: Press the knob once.
- Skip Forward: Push the knob to the right.
- Skip Backward: Push the knob to the left.
- Increase Volume: Push the knob upwards.
- Decrease Volume: Push the knob downwards.
- Answer/End Call: Press the knob once during an incoming call or active call.
- Reject Call: Press and hold the knob for 2 seconds during an incoming call.
- Activate Voice Assistant: Press and hold the knob for 2 seconds when no call is active.
5.2 Wired Connection
To use the headphones with a wired connection, plug the supplied 3.5mm audio cable into the 3.5mm jack on the headphones and into your audio source. The headphones do not need to be powered on for wired listening.
5.3 Audio Sharing
The Major IV headphones feature an audio sharing function. When connected wirelessly via Bluetooth, another pair of headphones can be plugged into the 3.5mm jack on the Major IV to share the audio output.
6. Maintenance
6.1 Cleaning
- Wipe the headphones with a soft, dry cloth.
- Do not use harsh chemicals or abrasive materials.
- Avoid getting moisture into any openings.
6.2 Storage
The Major IV headphones are designed to fold for compact storage. Fold them carefully to prevent damage. Store in a cool, dry place away from extreme temperatures and direct sunlight.
7. Troubleshooting
If you encounter issues with your Major IV headphones, refer to the following common solutions:
7.1 No Power / Not Turning On
- Ensure the headphones are fully charged. Connect them to a power source using the USB-C cable or a wireless charging pad.
- Verify that you are pressing and holding the multi-directional control knob for the correct duration (approx. 2 seconds) to power on.
7.2 Bluetooth Connectivity Issues
- Make sure the headphones are in pairing mode (flashing blue LED).
- Ensure Bluetooth is enabled on your device and it is within range (up to 10 meters).
- Try turning off and then turning on your device's Bluetooth.
- Forget "Major IV" from your device's Bluetooth list and attempt to pair again.
- Restart both your headphones and your device.
7.3 No Sound / Low Sound
- Check the volume levels on both your headphones (using the control knob) and your connected device.
- Ensure the headphones are properly connected via Bluetooth or the 3.5mm audio cable.
- If using a wired connection, ensure the cable is fully inserted into both the headphones and the audio source.
8. Specifications
| Model Name | Major IV |
| Connectivity Technology | Bluetooth 5.0 |
| Wireless Range | Up to 10 meters (30 feet) |
| Battery Life | 80+ hours (wireless playtime) |
| Quick Charge | 15 minutes charge for 15 hours playtime |
| Charging Time | Approximately 3 hours for full charge |
| Audio Driver Type | Dynamic Driver |
| Frequency Range | 20 Hz - 20 kHz |
| Headphones Jack | 3.5 mm Jack |
| Control Type | Multi-directional Control Knob |
| Weight | 6.3 ounces (178 grams) |
| Dimensions | 6.3 x 6.3 x 3.4 inches |
| Material | Plastic, Silicone |
| Special Features | Fast Charging, Foldable, Microphone Included, Wireless Charging Support |
9. Warranty & Support
9.1 Warranty Information
The Marshall Major IV headphones are covered by the Zound Industries USA Inc. one-year Limited Warranty. Additional terms and conditions may apply. Please refer to the official Marshall website or your purchase documentation for complete warranty details.
9.2 Customer Support
For further assistance, technical support, or to view the latest version of this manual, please visit the official Marshall website or contact their customer service department. You can also refer to the User Manual (PDF) for additional information.





