KEF LSX only one speaker working

KEF LSX: Troubleshooting One Speaker Not Working

The KEF LSX is a highly regarded wireless speaker system that offers exceptional sound quality and versatility. However, like any electronic device, it can encounter issues from time to time. One common problem that users may face is when only one speaker is working while the other remains silent. In this article, we will explore possible causes for this issue and provide troubleshooting steps to help you resolve the problem and restore the balanced audio experience.

1. Check the Physical Connections

The first step in troubleshooting a single-working speaker issue is to examine the physical connections of the KEF LSX system. Ensure that the faulty speaker is securely connected to the main unit or hub. Check the cables for any signs of damage, loose connections, or dirt that may be obstructing the signal transmission. If any issues are detected, reconnect the cables or replace them if necessary.

2. Verify the Power Supply

Another common reason for one speaker not working could be a power supply problem. Make sure that both speakers are properly powered on and connected to a reliable power source. Check the power cables and confirm that they are firmly plugged into the electrical outlets or power strips. Also, examine the power indicators on both speakers to verify if they are receiving power. If the faulty speaker doesn’t show any signs of power, try connecting it to a different outlet or swapping the power cables with the working speaker to rule out potential power-related issues.

3. Test the Audio Input Source

Sometimes, the audio input source may be the cause of the problem. Ensure that the source device (e.g., smartphone, computer, etc.) is correctly connected to the KEF LSX system. Confirm that the audio output settings on the source device are appropriately configured to enable sound output through both speakers. Try playing audio from a different source or application to see if the problem persists. If the issue is isolated to a particular source or application, troubleshooting efforts should be focused on the audio settings and compatibility with the KEF LSX system.

4. Perform a Speaker Swap

To identify whether the issue lies with the speaker or the main unit, perform a speaker swap. Disconnect the speakers from the main unit and swap their positions. If the previously silent speaker now produces sound while the other remains silent, it indicates that the issue is with the main unit. In this case, it is recommended to contact KEF’s customer support or a professional technician for further assistance and repairs.

5. Factory Reset the KEF LSX System

If the above steps haven’t resolved the problem, performing a factory reset on the KEF LSX system may help. Each speaker model may have specific reset instructions, so consult the user manual or KEF’s support documentation for precise guidance. Generally, a factory reset involves pressing a combination of buttons or switches on the speakers or using the dedicated mobile app to initiate the reset process. Keep in mind that a factory reset will erase any custom settings and configurations, so make a note or take pictures of your preferred settings before proceeding.

6. Seek Professional Assistance

If all else fails, it is advisable to seek professional assistance. Contact KEF’s customer support or reach out to an authorized service center to explain the issue and seek their guidance. They will have the expertise to diagnose the problem accurately and provide appropriate solutions or arrange for repairs if necessary.


Experiencing an issue with only one speaker working in the KEF LSX system can be frustrating, but it is not an uncommon occurrence. By following the troubleshooting steps mentioned above, you can often resolve the problem and restore the audio balance. Remember to check physical connections, verify the power supply, test the audio input source, perform a speaker swap, and consider a factory reset if needed. If the issue persists, do not hesitate to seek professional assistance from KEF’s customer support or authorized service centers. They have the knowledge and expertise to diagnose and resolve complex issues, ensuring that your KEF LSX system functions optimally once again.

In conclusion, the KEF LSX is a remarkable wireless speaker system that delivers exceptional audio quality. However, encountering the problem of only one speaker working can be frustrating. By systematically checking physical connections, verifying the power supply, testing the audio input source, performing a speaker swap, and considering a factory reset, you can often identify and resolve the issue. Remember to consult the user manual or KEF’s support documentation for model-specific instructions and seek professional assistance if needed.

With patience and troubleshooting efforts, you can restore the balanced audio experience and continue enjoying the immersive sound that the KEF LSX system offers.

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