If you hear a hum from your subwoofer, it may be caused by electrical interference or a grounding issue. Follow these steps to identify and resolve the problem.
Possible causes
- Interference: The subwoofer may be picking up electrical interference.
- Grounding issues: The subwoofer may not be connected to the same power source as the rest of your audio equipment.
Initial checks
- Power source: Check if the subwoofer is plugged into a power conditioner or a different circuit than your other audio equipment, as this can cause grounding hum.
- Cables: Use well-shielded cables or cables with a ferrite bead/collar to reduce interference.
- Cable routing: Ensure power cables and audio cables are not lying next to each other or bundled together, as this can induce noise.
Steps to eliminate hum
1. Disconnect everything
Unplug all devices from power.
2. Connect only the soundbar and subwoofer
Plug in only the soundbar and subwoofer (power and audio cables) and turn them on.
- Hum still present: Replace the subwoofer cable with a shielded cable. If the hum persists, check the subwoofer volume level and recalibrate the system.
- No hum: Proceed to the next step.
3. Connect the TV
Plug in the TV and check if the hum returns.
- Hum returned: Investigate the TV and its connecting cables as potential sources.
- No hum: Continue to the next step.
4. Connect one source at a time
Connect one source at a time (e.g., Blu-ray player) and check for hum after each addition. The source that introduces the hum is likely the cause.
Once the source is identified
- Replace any unshielded cables with shielded ones.
- Ensure all devices are properly grounded.
- Try moving the subwoofer or other components to reduce interference.
If the problem persists, please contact customer support for further assistance.