Which! testing the 55″ version said:
What’s the sound quality like?
It’s pretty ordinary. Content is clear, but shrill.
The top tones need restraining a bit. They should be bright and prominent, but not sharp and piercing. It creates a tinny effect that makes the audio sound cheap.
It does its best to immerse you with some surround sound effects and strong stereo, which is welcome, we just wish the audio was a bit more grounded and full.