there's a constant faint hissing or static noise coming from the soundbar speakers even when muted

DIAGNOSIS Ground loop or electrical interference, often introduced via the HDMI connection, or a faulty internal amplifier.

FIX Isolate the source by changing your audio connection method.

1. Disconnect the HDMI cable from the soundbar. Does the hiss stop? If yes, the issue is HDMI-related.
2. Try using a digital optical cable instead of HDMI for audio. If the hiss disappears, stick with optical.
3. If you must use HDMI, plug the soundbar and TV into the same power strip to ensure a common ground.

IF THAT DIDN'T WORK The hiss is internal. Perform a factory reset (press and hold Bluetooth & Volume Down buttons on the soundbar for 10 seconds). If it persists, it's a hardware fault.

HEADS UP Some level of amplifier noise is normal at very close range, but it shouldn't be audible from your seating position. If it's loud, contact support.