How to fix Sony soundbar buzzing sound
If you’re hearing a persistent buzz, hum, or rattle from a Sony soundbar, the cause is usually a simple hardware, wiring, or audio-settings issue.
The tricky part is identifying whether the noise comes from the speaker itself, a connected device, or the power setup.
This guide walks through the most effective ways to isolate the source and remove the buzz without guesswork.
What usually causes a Sony soundbar to buzz?
A Sony soundbar can buzz for several different reasons, and the sound often changes depending on volume, input source, or what devices are connected.
In many cases, the issue is not a defective soundbar at all but a problem with grounding, cable quality, or signal interference.
- Loose or damaged HDMI, optical, or AUX cables
- Power interference from outlets, surge protectors, or nearby electronics
- Ground loop noise between the TV, soundbar, and other devices
- Subwoofer pairing problems on wireless Sony systems
- Audio distortion caused by high volume or aggressive sound modes
- Internal hardware issues, such as a failing speaker driver or amplifier
Start by identifying where the buzzing comes from
Before changing settings, determine whether the buzz is coming from the soundbar speakers, the subwoofer, or the connection path.
This saves time and prevents unnecessary resets.
Test the soundbar with all inputs disconnected
Turn the soundbar on with no HDMI, optical, AUX, or Bluetooth source actively playing.
If the buzzing continues, the issue is likely related to power, internal hardware, or standby behavior rather than the TV signal.
Switch between inputs
Test each source one at a time, such as HDMI ARC/eARC, optical, Bluetooth, and USB if available.
If the buzz only happens on one input, the source device or cable is more likely to blame than the soundbar itself.
Listen near the subwoofer and rear channels
On Sony systems with a wireless subwoofer or surround speakers, the buzzing may be isolated to one component.
A subwoofer buzzing lightly at idle can point to pairing issues, signal interference, or placement near electronics.
Check cables and connections first
Poor or loose connections are among the most common causes of buzzing.
Even a cable that looks fine can carry unwanted noise if the shielding is weak or the connector is not seated properly.
- Unplug and firmly reconnect all HDMI, optical, AUX, and power cables.
- Inspect cables for bends, frays, or crushed sections.
- Use a certified high-speed HDMI cable for ARC or eARC.
- If using optical audio, make sure the connectors click securely into place.
- Avoid running audio cables parallel to power cords for long distances.
If the buzzing disappears after swapping a cable, the old cable was likely introducing interference or poor signal integrity.
Rule out grounding and power issues
A low hum or electrical buzz often comes from the power side of the setup.
This is especially common when the TV, soundbar, streaming box, game console, and subwoofer are plugged into different outlets.
Plug devices into the same power strip
When possible, connect the TV and Sony soundbar to the same surge protector or power strip.
This can reduce ground loop noise caused by slight voltage differences between outlets.
Try a different wall outlet
If the buzz changes or stops in another outlet, the original outlet or circuit may be contributing to the noise.
Test the soundbar alone before connecting other devices.
Remove power accessories temporarily
Bypass smart plugs, UPS units, extension cords, and low-quality surge protectors during testing.
Some power accessories introduce noise or unstable voltage that shows up as buzzing in audio equipment.
Adjust Sony soundbar audio settings
Some buzzing complaints are actually distortion from settings that overdrive the speakers.
Sony soundbars include audio processing features that can sound impressive, but they can also expose weak signals or create unwanted artifacts.
- Lower the master volume and test again.
- Disable sound modes such as Movie, Music, Night, or Voice enhancement one at a time.
- Turn off extra bass or bass boost features if the buzz is strongest in low frequencies.
- Set the TV audio output to PCM if Dolby Atmos, Dolby Digital, or passthrough settings seem unstable.
- Test with the TV speakers briefly to confirm the source audio itself is clean.
If the buzzing only appears at high volume, the soundbar may be clipping.
Clipping happens when the amplifier or driver cannot reproduce the signal cleanly and begins to distort.
Fix Bluetooth and wireless interference
Wireless audio can pick up interference from Wi-Fi routers, smart home devices, cordless phones, and other electronics.
On Sony models that support Bluetooth or wireless surround speakers, a buzz may be more noticeable during weak signal conditions.
- Move the soundbar and subwoofer away from routers and microwave ovens.
- Keep metal furniture and cabinets away from wireless components.
- Reduce the distance between the soundbar and the source device during testing.
- Disconnect nearby Bluetooth devices that may be competing for signal.
- Restart the TV, soundbar, and subwoofer to re-establish pairing.
If your Sony soundbar includes a wireless subwoofer, check the pairing status light.
An unstable link can create humming, popping, or periodic buzzing.
Update firmware and reboot the system
Firmware bugs can affect audio processing, HDMI handshakes, and wireless stability.
Sony frequently releases updates that improve compatibility with TVs, consoles, and streaming devices.
- Check the Sony support page or the soundbar app for available firmware updates.
- Install any update recommended for your model.
- Power off the TV and soundbar completely.
- Unplug both devices for at least 60 seconds.
- Reconnect and test audio again.
A full power cycle clears temporary glitches more reliably than standby mode alone.
Reset the soundbar if the buzzing persists
If the buzzing continues after cable, power, and settings checks, a factory reset may help.
Resetting clears stored settings that may be causing the audio chain to misbehave, especially after a firmware change or device swap.
Before resetting, record your custom settings so you can restore them later.
After the reset, pair the subwoofer again if required and test the soundbar with a known-good source.
When the buzzing points to a hardware problem
If the noise occurs with all inputs disconnected, on multiple power outlets, and after a reset, the issue may be hardware-related.
A damaged speaker driver, faulty amplifier, or internal power supply problem can all produce buzzing.
Signs that suggest service may be needed include:
- Buzzing from one speaker only
- Rattling that worsens with bass notes
- Noise that remains constant regardless of input or volume
- Burning smell, overheating, or intermittent shutdowns
- Buzzing that started after a power surge or physical impact
If the soundbar is under warranty, contact Sony support or an authorized service center rather than opening the unit yourself.
Best practices to prevent buzzing from returning
Once the problem is fixed, a few setup habits can help keep it from coming back.
These are especially useful if you use an HDMI ARC or eARC connection with multiple home theater devices.
- Use high-quality, shielded cables.
- Keep power and audio cables separated.
- Run the TV and soundbar from the same outlet or power strip when possible.
- Update firmware regularly.
- Avoid maxing out bass and volume settings for long periods.
- Place wireless components away from routers and other signal-heavy devices.
These steps reduce electrical noise, improve signal stability, and make it easier to spot future issues before they become permanent.
What to test if you still need to troubleshoot
If you’re still trying to determine how to fix Sony soundbar buzzing sound, isolate one variable at a time.
Test with a different TV, a different HDMI port, a different cable, and a different power outlet.
That method makes it much easier to determine whether the buzz is caused by the soundbar, the source device, or the environment around it.